Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| hysterosalpingography: a technique to aid in assessment of reproductive fitness of female squirrel monkeys (saimiri sciureus). | a hysterosalpingography method was developed to examine the uterine cavity and oviducts of potential additions to our squirrel monkey breeding colony and those animals within the colony with a history of infertility. females to be examined were anesthetized and placed in dorsal recumbency. a needle was inserted transabdominally into the body of the uterus, the cervix was sealed with a clamp applied vaginally, and water soluble contrast media was infused into the uterine cavity with sufficient pr ... | 1983 | 6664072 |
| the subcortical afferents to caudate nucleus and putamen in primate: a fluorescence retrograde double labeling study. | the cellular origin and degree of collateralization of the subcortical afferents to the caudate nucleus and the putamen in squirrel monkeys (saimiri sciureus) were studied using the following combinations of fluorescent retrograde tracers: evans blue and dapi-primuline, fast blue and nuclear yellow, true blue and nuclear yellow. after the injections, cells containing the tracer delivered in caudate nucleus (caudate-labeled cells) and others labeled with the complementary tracer injected in putam ... | 1983 | 6664490 |
| preliminary quantitative studies of prehension in squirrel monkeys (saimiri sciureus). | squirrel monkeys were filmed in the act of prehending objects of various sizes, shapes, and states of motion. subsequent three-dimensional analyses indicated that general aspects of prehension do not vary grossly across individuals nor as a function of the object to be prehended, at least at the level of measurement used in these studies. the monkeys exhibited only whole-hand control, even with small or moving objects. however, in comparison with stationary objects, moving objects did elicit var ... | 1983 | 6667371 |
| effects of reproductive state on vocalizations in squirrel monkeys (saimiri sciureus). | vocalizations and behavior of a group of 6 squirrel monkeys, 2 males and 4 females, were recorded during the nonbreeding and breeding seasons. behavioral and physical criteria were used to determine the presence of estrus. during the breeding season the types of vocalizations uttered by estrous females changed, and the adult male increased his rate of vocalizing. err vocalizations by estrous females were associated with increased following and initiation of affiliative behavior with the adult ma ... | 1983 | 6685097 |
| afferent fibers to the cingular vocalization region in the squirrel monkey. | three squirrel monkeys (saimiri sciureus) received horseradish peroxidase injections in the anterior cingulate cortex at the level of the genu of the corpus callosum, a region yielding vocalization when electrically stimulated. retrogradely labeled neurons were found at the cortical level within the dorsomedial and lateral prefrontal cortex (areas 9 and 10), orbital cortex (area 11), premotor cortex (areas 44, 6b, and 8), frontoparietal operculum, insula, cortex of the superior temporal sulcus, ... | 1983 | 6840246 |
| epidemic toxoplasmosis in captive squirrel monkeys (saimiri sciureus). | 1983 | 6845610 | |
| stomatocytosis in a colony of captive squirrel monkeys (saimiri sciureus). | chronic stomatocytosis, which increased in severity as a function of the time that animals were held in captivity, was observed in a small colony of squirrel monkeys. the stomatocytosis was associated with increasing hematocrits possibly due to a change in packing characteristics of the erythrocytes rather than any overt changes in the erythrocyte mass. reticulocytes remained at control levels throughout development of the stomatocytosis. the most probable cause of this alteration in erythrocyte ... | 1983 | 6876741 |
| differences in spectral response properties of lgn cells in male and female squirrel monkeys. | the spectral response patterns of single cells recorded from the lateral geniculate nucleus (lgn) of the squirrel monkey (saimiri sciureus) were examined in light of recent behavioral evidence indicating that there are significant variations in visual sensitivity and color vision within this species. the principal results from an analysis of data obtained from 1084 lgn cells were that (a) a significantly higher proportion of cells showing spectrally-opponent response patterns were recorded from ... | 1983 | 6880043 |
| selective regulation of brain and body temperatures in the squirrel monkey. | many panting mammals can cool the brain below body core temperature during heat stress. studies on human subjects suggest that primates may also be able selectively to regulate brain temperature. we examined this possibility by measuring hypothalamic (thy) and colonic (tco) temperatures of unanesthetized squirrel monkeys (saimiri sciureus) in two different experiments. first, thy and tco were examined at four different ambient temperatures (ta) between 20 and 36 degrees c. over this range of ta, ... | 1983 | 6881387 |
| plasmodium inui and babesia microti infections in the squirrel monkey, saimiri sciureus. | the course of plasmodium inui and babesia microti infections was studied in seven splenectomized squirrel monkeys (saimiri sciureus) of guyanan or bolivian origin. three of the monkeys were infected with p. inui either by the inoculations of parasitized blood or by the bite of infected mosquitoes. the remaining four monkeys were infected by the inoculation of parasitized blood, containing p. inui and b. microti in three and with b. microti only in one. the infection in all seven animals was seve ... | 1983 | 6881416 |
| the different types of synapses in the thalamic nucleus ventralis anterior (va) of saimiri sciureus and their degeneration after pallidum coagulation. | in the squirrel monkey (saimiri sciureus) the nucleus va or lateropolaris (l. po), occupying the rostro-lateral pole of the thalamus, contains 7 principal types of synapses, two of which have axo-spinous variants, i.e., type i lr (spi) and type v so (spi). the synapses of type i lr (large boutons, round to ovoid vesicles) and type ii ef (encapsulated bouton, elongated to flat vesicles) contain large vesicles sometimes attached by neurofilaments. because the type iv mr (medium size, round vesicle ... | 1983 | 6886386 |
| studies on the indochina i/cdc strain of plasmodium falciparum in colombian and bolivian aotus monkeys and different anophelines. | the indochina i/cdc strain of plasmodium falciparum was isolated from a physician returning to the united states after working in the refugee camps along the thailand-kampuchean border. the strain was established in splenectomized aotus monkeys from colombia after being grown in vitro for 50 days. during the first three passages in colombian monkeys, the parasites were not infective to bolivian aotus monkeys. after six intervening passages in saimiri sciureus monkeys, the parasites produced high ... | 1983 | 6338191 |
| [use of purified antigens in the serodiagnosis and epidemiologic studies of human malaria. importance of the elisa technic for determining specific igg and igm]. | a purified antigen was isolated from the red blood cells of saimiri sciureus which was experimentally infected by plasmodium falciparum. an enzyme immunoassay (elisa) was carried out thanks to this antigen. the results obtained with the test were evaluated from two series of sera: one coming from an endemic area, the other taken out of it. the results were compared with those obtained with indirect fluorescent antibody test (ifat) which is considerated as reference test. there is a good correlat ... | 1983 | 6340845 |
| saimiri sciureus (karyotype 14-7): an alternative experimental model of plasmodium falciparum infection. | in an earlier manuscript, we described the first phase of adaptation of the palo alto i strain of plasmodium falciparum to saimiri sciureus (squirrel monkeys). now, after more than 50 p. falciparum blood transfers in splenectomized saimiri, the parasite has become fully adapted to this experimental host. a highly reproducible pattern of infection is evident in these splenectomized animals, which is characterized by a rapidly rising parasitemia and a lethal outcome. in intact animals, the course ... | 1983 | 6344671 |
| studies of the sal i strain of plasmodium vivax in the squirrel monkey (saimiri sciureus). | the sal i strain of plasmodium vivax was successfully adapted to three phenotypes of the squirrel monkey, saimiri sciureus. through five linear blood passages, parasitemias in excess of 200,000/mm3 blood were attained; bolivian phenotype saimiri appear to develop higher peak parasitemias. sporozoites of the sal i strain inoculated intravenously produced patent parasitemias in all five squirrel monkeys challenged, with prepatent periods ranging from 21 to 38 days. anopheles freeborni and an. gamb ... | 1983 | 6355425 |
| ethological analysis of amphetamine action on social behavior in squirrel monkeys (saimiri sciureus). | 1983 | 6359170 | |
| scapula of apidium phiomense: a small anthropoid from the oligocene of egypt. | a scapular fragment from the upper fossil wood zone, quarry i, fayum depression, egypt, is assigned to the taxon apidium phiomense. this animal may have approximated the size of galago crassicaudatus or nycticebus coucang, as predicted by regressing body weight on glenoid surface area and fossa length for an assortment of living primates. morphometric values for spinoglenoid, axilloglenoid, and axillospinal angles indicate locomotor affinities of a. phiomense with colobine monkeys. other nonmetr ... | 1983 | 6407926 |
| infection of female squirrel monkeys (saimiri sciureus) with trichomonas vaginalis as a model of trichomoniasis in women. | marmosets, tamarins, owl monkeys, and squirrel monkeys were inoculated intravaginally with trichomonas vaginalis. the latter animal species was most susceptible, trichomonads being recovered from four of six monkeys for periods ranging usually up to one month. vaginal discharge was seen in most infected animals but polymorphonuclear leucocytes were rare. infected animals developed serum igg antibody responses and also local igg and iga responses, the latter occurring sometimes on reinoculation i ... | 1983 | 6409346 |
| immunoprecipitation as a tool for studying humoral immunity of natural and experimental hosts of herpesvirus saimiri. | herpesvirus saimiri strain 11 and attenuated h. saimiri strain 11 proteins synthesized during the lytic cycle of virus replication were used for immunoprecipitation with various sera from natural (saimiri sciureus) and experimental (saguinus nigricollis, saguinus fuscicollis, aotus trivirgatus, new zealand white rabbits) hosts. the analysis of the precipitates separated in sodium dodecyl sulfate:polyacrylamide gels revealed that in tumor-developing animals a specific set of viral polypeptides we ... | 1983 | 6303583 |
| viral-induced astrocytomas in squirrel monkeys. | saimiri sciureus, the squirrel monkey, is susceptible to the oncogenic effects of jcv following intracerebral inoculation. as in owl monkeys, tumor development follows an incubation time of 14 to 30 months. four of six virus-inoculated monkeys developed cerebral tumors, three of which were astrocytomas grade 4 and the remaining tumor was a poorly differentiated astrocytoma. all tumors showed high cellularity, mitotic figures, and cellular pleomorphism. in the astrocytoma grade 4, neovascularizat ... | 1983 | 6304760 |
| the output organization of the substantia nigra in primate as revealed by a retrograde double labeling method. | the cellular origin and degree of collateralization of the efferent projections of the substantia nigra pars reticulata (snr) in the squirrel monkey (saimiri sciureus) were studied using the following combinations of fluorescent retrograde tracers: evans blue and dapi-primuline, fast blue and nuclear yellow, true blue and nuclear yellow. in a first series of experiments one tracer was injected in the ventral anterior (va) and ventral lateral (vl) thalamic nuclei, and the complementary tracer was ... | 1983 | 6305462 |
| electrophysiologic studies on the pallido- and cerebellothalamic projections in squirrel monkeys (saimiri sciureus). | thalamic projections of the pallidum and the deep cerebellar nuclei were studied by unitary recordings as well as field potential analysis in the thalamus of squirrel monkeys (saimiri sciureus) under sodium pentobarbital anesthesia. stimulation of the pallidum produced a positive field potential preceded by incoming afferent fiber volleys in the thalamus. spontaneous discharges of thalamic neurons were suppressed during this positive potential corresponded to that of the hyperpolarizing potentia ... | 1983 | 6309551 |
| the pallidointralaminar and pallidonigral projections in primate as studied by retrograde double-labeling method. | the cellular origin and degree of collateralization of the pallidointralaminar and pallidonigral projections in squirrel monkey (saimiri sciureus) were studied using evans blue (eb) and a mixture of dapi-primuline (dp) as fluorescent retrograde tracers. in a first series of experiments eb was injected into the va/vl thalamic nuclei whereas dp was delivered into the cm/pf complex. after these injections numerous eb-labeled cells were scattered throughout the central 'motor' zone of the internal s ... | 1983 | 6315152 |
| columnar organization of corticocortical projections in squirrel and rhesus monkeys: similarity of column width in species differing in cortical volume. | to compare the size and pattern of the terminal distribution of corticocortical projections in two primate species with brains of different size, tritiated amino acids were injected into the prefrontal cortex of new world squirrel monkeys (saimiri sciureus) and old world rhesus monkeys (macaca mulatta), and their brains were processed for light microscopic autoradiography. in both species, prefrontal efferents are directed to a number of cortical targets in the same and opposite hemispheres, whe ... | 1983 | 6315786 |
| evidence for thalamic projections from external cuneate nucleus, cell groups z and x, and the mesencephalic nucleus of the trigeminal nerve in squirrel monkey. | horseradish peroxidase (hrp) was injected into the thalamic ventral tier of squirrel monkey and the brainstem was examined for the presence of hrp-reactive cells in the external cuneate nucleus (ecn), nuclei z and x, and the mesencephalic nucleus of the trigeminal nerve (mnv). results indicate that the ecn, z and x have a direct projection to contralateral ventral tier. thalamic projecting cells in the ecn are located predominantly in the medial part of this nucleus. the mnv projects bilaterally ... | 1983 | 6316220 |
| studies on the cerebellocerebral and thalamocortical projections in squirrel monkeys (saimiri sciureus). | laminar field potential analysis of the cerebellocerebral and thalamocortical (t-c) responses was carried out in the cerebral cortex of squirrel monkeys (saimiri sciureus) under pentobarbital anesthesia. anatomical studies using horseradish peroxidase (hrp) were combined with electrophysiological studies. stimulation of the fastigial nucleus induced bilaterally surface positive-depth negative potentials, i.e., deep t-c responses, in the medial part of the motor cortex and in the parietal cortex ... | 1983 | 6295799 |
| background and stimulus-induced patterns of high metabolic activity in the visual cortex (area 17) of the squirrel and macaque monkey. | we have used 2-deoxy-d-[14c]glucose (2-dg) autoradiography and cytochrome oxidase histochemistry to examine background and stimulus-induced patterns of metabolic activity in monkey striate cortex. in squirrel monkeys (saimiri sciureus) that binocularly or monocularly viewed diffuse white light or binocularly viewed bars of many orientations and spatial frequencies, 2-dg consumption was not uniform across the cortex but consisted of regularly spaced radial zones of high uptake. the zones extended ... | 1983 | 6296333 |
| [infection of new world primates with junín virus. iv. aotus trivirgatus]. | owl monkeys (aotus trivirgatus) were inoculated with xj, a pathogenic strain of junin virus, seeking new animal models for argentine hemorrhagic fever. nine monkeys were inoculated intramuscularly with 30 or 300,000 tcid50 of junin virus. hematological and virological studies showed no alteration in blood elements such as red cell, reticular cell and platelets, up to 28 days after inoculation. hemoglobin and hematocrit determinations also remained constant. however, significant neutropenia was s ... | 1983 | 6101070 |
| the laminar organization of the lateral geniculate body and the striate cortex in the squirrel monkey (saimiri sciureus). | the organization of the projection from the lateral geniculate body to the striate cortex in the squirrel monkey has been re-examined using the anterograde and retrograde transport of horseradish peroxidase (hrp) and wheat germ agglutinin conjugated to hrp. the results confirm earlier findings that the projections of the magnocellular and parvocellular layers of the lateral geniculate body terminate in separate sublaminae of layer iv of striate cortex; a more superficial projection of the parvoc ... | 1983 | 6187901 |
| heteroimmunization of squirrel monkeys (saimiri sciureus) with a purified porcine zona antigen (ppza): immune response and biologic activity of antiserum. | the potential for utilization as a contraceptive vaccine of a 60,000 mr glycoprotein component, purified porcine zona antigen (ppza), isolated from porcine zonae, was investigated in the squirrel monkey. immunization resulted in production and maintenance of high antibody titers for at least 1 year. comparable immune profiles were obtained using either monkey or pig zonae in assay systems, but dose-dependent variations in immune response were not observed. in situ antibody binding to monkey zona ... | 1983 | 6825869 |
| within-species variations in visual capacity among squirrel monkeys (saimiri sciureus): sensitivity differences. | earlier observations suggested there might be significant within-species variations in visual sensitivity among squirrel monkeys (saimiri sciureus). reported here are the results from measurements of increment-threshold spectral sensitivity in 41 squirrel monkeys of peruvian origin. as determined in a forced-choice discrimination task, no large variations were found among these animals in sensitivity to a 540 nm test light. however, there were large individual variations in sensitivity to a 640 ... | 1983 | 6868399 |
| the effects of light reinforcement and noise on young and old squirrel monkeys (saimiri sciureus). | in two age groups of squirrel monkeys, subjects performed an operant response for light onset in the presence or absence of white noise. results of the study indicate that light is an effective reinforcer for both younger and older monkeys, but differentially. the study also indicates that the presence of white noise affects responding in both age groups dissimilarly. | 1983 | 6628496 |
| an interresponse-time analysis of responding maintained by schedules of response-produced electric shock. | the present study investigated ratio contingencies to evaluate factors that may determine the maintenance of responding when electric shock is the consequent event. initially, squirrel monkeys (saimiri sciureus) were exposed to a continuous-avoidance schedule to initiate bar pressing. subsequently, a multiple random-interval variable-ratio yoked schedule of response-produced shock was used to maintain and to compare interval and ratio performance. a microcomputer recorded and stored the number o ... | 1983 | 16812341 |
| morphology of the interorbital region of saimiri sciureus. | the skull of the platyrrhine primate saimiri sciureus is distinguished by a large interorbital fenestra. juvenile skulls still show a bony interorbital septum with some small gaps. a morphogenetic study was undertaken to better understand the structures of the interorbital region, which represents a linkage between the base of the braincase and the nasal skeleton. already in early ontogenetic stages a reduction of the posterior portion of the nasal capsule and of the cartilaginous interorbital s ... | 1983 | 6671631 |
| brief report: synthesis of ribonucleic acid in oocytes collected from squirrel monkeys and humans following chorionic gonadotropin administration. | the time between administration of human chorionic gonadotropin (hcg) and follicle aspiration was analyzed for alterations in [3h]uridine incorporation [as an indicator of relative synthesis of ribonucleic acid (rna)] of oocytes from squirrel monkeys and humans. there was a significant decline in both the uptake and incorporation of [3h]uridine in squirrel monkey oocytes by 36 hr following hcg administration to the animals, as compared with 16 hr after hcg. similarly, rna synthesis diminished in ... | 1983 | 31986854 |
| taxonomy of squirrel monkeys genus saimiri (cebidae, platyrrhini): a preliminary report with description of a hitherto unnamed form. | two groups of squirrel monkeys, genus saimiri, are distinguished by external characters. the first, or roman type, contains saimiri boliviensis of upper amazonia south of the rio marañón-amazonas, with two subspecies of which s. boliviensis peruviensis is described as new. the second group, or gothic type, contains three species: saimiri sciureus with four subspecies distributed over much of tropical south america, saimiri ustus of brazil between the south bank amazonian rios purús and xingu, an ... | 1984 | 32160721 |
| accumulation of 2-deoxy-d-glucose by primate oocytes fertilized in vitro. | the present study was designed to investigate the accumulation of 2-deoxy-d-glucose (2-dg) by squirrel monkey oocytes fertilized in vitro; to assess the effects of insulin addition to the medium on 2-dg accumulation; and, finally, to evaluate the use of 2-dg in viability determinations of oocytes. accumulation of 2-dg by unfertilized oocytes from squirrel monkeys was 13.94 fmol/oocyte/3 h and was not affected by the addition of either 10 nm or 1 μm insulin. there was no change in 2-dg accumulati ... | 1984 | 32138458 |
| behavioral responses to species-specific warning calls in infant squirrel monkeys reared in social isolation. | six infant squirrel monkeys were reared in social isolation. they responded differentially to playbacks of two species-specific alarm calls. the reaction to the alarm peep, the warning call to bird predators, was a prompt flight to the mother surrogate and essentially resembled the respective behavior of mother-reared infants. the responses to yapping, the alarm call to terrestrial predators, were less clear-cut and habituated soon. however, when yapping was played back in connection with the pr ... | 1984 | 32131565 |
| diurnal variations of androgens in sexually mature male bolivian squirrel monkeys (saimiri sciureus) during the breeding season. | to assess diurnal fluctuations of serum androgens and cortisol in adult male bolivian squirrel monkeys, these steroids were measured at predetermined times (0300, 0900, and 2300 hours) during two separate 24-hour periods in the breeding season (january 1983 and late november 1983). a significant diurnal change in serum cortisol was noted, with a nadir of 99.9 ± 11.9 μg/dl (x̄ ± sem) at 2300 hours and a peak of 168.9 ± 7.8 μg/dl at 0900 hours. conversely, a nadir in serum testosterone was noted a ... | 1984 | 32111108 |
| ultradian periodicities in eeg and behavior in the squirrel monkey (saimiri sciureus). | this report describes periodic oscillations in electroencephalographic (eeg) and behavioral activity with a cycle length of 15-30 seconds in chair-restrained squirrel monkeys (saimiri sciureus). these oscillations consisted of alternating episodes of vigilance, characterized by visual scanning and motor movement, and inattentiveness, characterized by behavioral quiescence with little eye or limb movement. during vigilance the eeg exhibited low-amplitude, high-frequency (> 16 hz) activity. during ... | 1984 | 32106638 |
| seasonal changes of serum concentrations of estradiol and progesterone in bolivian squirrel monkeys (saimiri sciureus). | serial measurements of estradiol (e2) and progesterone (p) were used to describe the ovarian cycle of the bolivian squirrel monkey. group-caged, sexually mature female squirrel monkeys, housed with males, were sampled daily between 0900 and 1100 hr. sampling was carried out during the breeding and nonbreeding seasons, for periods of 19-20 days from september 1981 to may 1982. seasonal differences in serum concentrations of e2 and p were found with low levels of e2 and p and an absence of preovul ... | 1984 | 31986841 |
| the illustrated squirrel monkey. review of squirrel monkeys (saimiri sciureus) in a seminatural environment, authored and published by john d. baldwin, 1983, department of sociology, university of california at santa barbara. available on a 24 minute, 3/4 inch videocassette from the wisconsin regional primate research center library for loan. | 1984 | 31986837 | |
| within-species variations in visual capacity among squirrel monkeys (saimiri sciureus): color vision. | color vision was studied in 27 squirrel monkeys (saimiri sciureus) of peruvian origin (roman arch variety). tests of wavelength discrimination and rayleigh matching as well as a search for a spectral neutral point were carried out in a behavioral paradigm involving a three-alternative, forced-choice discrimination. significant individual variations in color vision were found in this species. some squirrel monkeys have trichromatic color vision, others are dichromats. within each of these catagor ... | 1984 | 6523747 |
| the somatotopic organization of the ventroposterior thalamus of the squirrel monkey, saimiri sciureus. | multiunit microelectrode mapping techniques were used to investigate the organization of the somatosensory thalamus in squirrel monkeys. receptive fields and response characteristics were determined for closely spaced recording sites along arrays of electrode penetrations that passed through the ventral thalamus dorsoventrally, rostrocaudally, or lateromedially. the results were related to thalamic architecture and led to the following conclusions: (1) a large, single, systematic representation ... | 1984 | 6736292 |
| role of the suprachiasmatic nuclei in the circadian timing system of the squirrel monkey. ii. light-dark cycle entrainment. | the role of the suprachiasmatic nuclei (scn) in light-dark (ld) cycle entrainment in the squirrel monkey (saimiri sciureus) was evaluated by continuously monitoring core body temperature and drinking behavior in both intact and scn-lesioned animals exposed to different ld conditions. in a 24-h ld cycle with 12 h of light per day (ld 12:12), both intact and scn-lesioned monkeys had a prominent rhythm in body temperature with an acrophase 6.51 +/- 0.36 h (intact) or 5.12 +/- 0.42 h (scn-lesioned) ... | 1984 | 6733474 |
| identification of eight types of synapses in the pallidum externum and internum in squirrel monkey (saimiri sciureus). | the electron microscopic study of the neuronal structures of the pallidum externum (pa.e) and internum (pa.i) in squirrel monkey (saimiri sciureus) has revealed in both segments a frequent large type of nerve cell and a rare small one, probably an interneuron. with respect to the small cells, only one axosomatic synapse inserts on the slender rim of cytoplasm; the clear nucleus is always invaginated and contains a small nucleolus. eight types of synapses can be differentiated in pa.e and pa.i. t ... | 1984 | 6702413 |
| role of the suprachiasmatic nuclei in the circadian timing system of the squirrel monkey. i. the generation of rhythmicity. | the circadian organization of squirrel monkey (saimiri sciureus) drinking behavior was evaluated before and after the placement of radiofrequency lesions which completely destroyed the suprachiasmatic nuclei (scn) in 4 monkeys and partially ablated the scn in another 4 animals. in continuous illumination (ll: 600 lux) prior to surgery, each monkey had a precise free-running circadian rhythm of drinking behavior with a period of 25.31 +/- 0.21 h (means +/- s.e.m.). by 4-6 weeks following the lesi ... | 1984 | 6733473 |
| dendritic growth following labyrinthectomy in the squirrel monkey. light and electron microscopic studies. | in the squirrel monkey (saimiri sciureus) peripheral vestibular dendrites underwent degeneration after destruction of the vestibular end organs (labyrinthectomy). the dendrites subsequently grew into the remodelled area where the end organs, surrounding tissues and inner ear fluid spaces were previously located, and were progressively occupied by connective tissue, blood vessels and also new bone. this finding indicates that peripheral vestibular dendrites of adult squirrel monkey can grow, that ... | 1984 | 6720297 |
| distribution of acetylcholinesterase-containing neurons in the basal forebrain and upper brainstem of the squirrel monkey (saimiri sciureus). | the topographical distribution of neurons containing acetylcholinesterase (ache, ec 3.1.1.7) in the basal forebrain and upper brainstem of the squirrel monkey (saimiri sciureus) was studied by means of butcher's pharmacohistochemical technique which involves staining for ache at various times after the systemic administration of the ache inhibitor di-isopropylphosphorofluoridate (dfp). only those neurons whose ache staining was as intense as that of known cholinergic neurons present in the same ... | 1984 | 6713215 |
| a nonhuman primate model of gilbert's syndrome. | a bolivian population of squirrel monkeys, saimiri sciureus, exhibits several features of gilbert's syndrome in man, and is proposed as a nonhuman primate model of the condition. the bolivian population was found to have higher fasting (40.6 +/- 2.7 microm; mean +/- s.e.) and postcibal (9.9 +/- 0.9 microm) plasma unconjugated bilirubin concentrations (p less than 0.001) than a closely related brazilian population (fasting 5.5 +/- 0.7 microm); postcibal (2.4 +/- 0.7 microm). after intravenous adm ... | 1984 | 6706295 |
| distribution of substance p and enkephalin-like immunoreactivity in the substantia nigra of rat, cat and monkey. | a comparative study of the distribution of substance p (sp) and enkephalin (enk) immunoreactivity in the substantia nigra (sn) of the rat, cat and squirrel monkey (saimiri sciureus) was undertaken by means of the indirect immunofluorescence technique. in the rat a dense neuronal network composed of fine fibers displaying sp immunoreactivity is uniformely distributed throughout the rostrocaudal extent of the substantia nigra pars reticulata (snr) and in the ventral part of substantia nigra pars c ... | 1984 | 6208980 |
| an hrp study of hypothalamo-cerebellar and cerebello-hypothalamic connections in squirrel monkey (saimiri sciureus). | this study describes the distribution of labeled hypothalamic neurons in squirrel monkey following pressure injections of horseradish peroxidase (hrp) into cerebellar cortex and the pattern of labeling in the cerebellar nuclei subsequent to iontophoretic injections localized in the hypothalamus. two types of hrp (hrp and a wheat germ agglutinin conjugate, hrp-wga) were used as tracers; tetramethylbenzidine was the chromogen. retrogradely filled neurons were found in lateral (lhar) and posterior ... | 1984 | 6209312 |
| conditional discrimination with conceptual simultaneous and successive cues in the squirrel monkey (saimiri sciureus). | at the end of several stages of training, 4 squirrel monkeys met an 87% criterion for choosing correctly between exemplars of the concept "sameness" and the concept "difference," the simultaneous cues, as a function of having been cued by an exemplar either of the concept "triangularity" (cued sameness) or "heptagonality" (cued difference), the successive cues, which were presented in random order. in addition, the best monkey met criterion when the exemplars of sameness and difference were pres ... | 1984 | 6210175 |
| variations of colour vision in a new world primate can be explained by polymorphism of retinal photopigments. | the squirrel monkey (saimiri sciureus) exhibits a polymorphism of colour vision: some animals are dichromatic, some trichromatic, and within each of these classes there are subtypes that resemble the protan and deutan variants of human colour vision. for each of ten individual monkeys we have obtained (i) behavioural measurements of colour vision and (ii) microspectrophotometric measurements of retinal photopigments. the behavioural tests, carried out in santa barbara, included wavelength discri ... | 1984 | 6149558 |
| adaptation of the mineralocorticoid target tissues to the high circulating cortisol and progesterone plasma levels in the squirrel monkey. | many new world primate species have elevated circulating free plasma cortisol concentrations, target tissue resistance to cortisol, and no evidence of sodium retention. a representative new world primate, the squirrel monkey (saimiri sciureus), has plasma cortisol concentrations above those necessary to cause complete suppression of the renin-angiotensin-aldosterone axis in an old world primate, the cynomolgus monkey (macaca fascicularis). despite this, the arterial blood pressure as well as the ... | 1984 | 6329650 |
| serological analysis of ureaplasmas isolated from various animals. | ureaplasmas from various animal species were serologically characterized by the growth inhibition test as well as by the metabolism inhibition test. the animals positive for ureaplasmas included 9 common squirrel monkeys, 9 green monkeys, 164 cynomolgus monkeys, 58 chimpanzees, 73 goats, 11 sheep, 102 dogs, 116 cats, 64 cattle, 290 chickens, 3 red jungle fowls and 5 japanese bantams. simian ureaplasmas were divided into four serogroups in accordance with the zoological classification of the prim ... | 1984 | 6439681 |
| indoleamine-accumulating horizontal cells in the squirrel monkey retina. | horizontal cells capable of selectively accumulating indoleamines have been found in the retina of saimiri sciureus, the new world squirrel monkey. the uptake of 3h-serotonin (5ht) in vivo and in vitro has been localized by light and electron microscopic (em) autoradiography only to horizontal cells. in the central retina up to 50% and in the periphery 15-20% of the somas lying at the scleral border of the inner nuclear layer are labeled. in em autoradiographs, labeled processes occur as lateral ... | 1984 | 6469494 |
| types of synapses and degeneration in the thalamic nucleus ventralis oralis posterior after cerebellar lesions in the squirrel monkey. | the thalamic nucleus ventralis oralis posterior (v.o.p) of saimiri sciureus corresponds to the posterior basal part of the ventral lateral nucleus and is characterized by medium-sized nerve cells. electron microscopic study revealed seven different types of synapses and the size of vesicles in each has been quantitatively determined. the synapse of type i lr (large with rounded vesicles) is considerably larger than the similar type iv mr (medium-sized with rounded vesicles) both contain round to ... | 1984 | 6481156 |
| biological and thrombolytic properties of proenzyme and active forms of human urokinase--ii. turnover of natural and recombinant urokinase in rabbits and squirrel monkeys. | the turnover of recombinant pro-urokinase (rec-pro-uk), recombinant urokinase (rec-uk) and natural urinary urokinase (nat-uk) was studied in rabbits and in squirrel monkeys (saimiri sciureus). following intravenous injection, urokinase activity disappeared rapidly from the blood. the initial disappearance rate could be described by a single exponential term with a t 1/2 of 3 to 6 min for each molecular form of urokinase in both species. urokinase related antigen, measured with a radioimmunoassay ... | 1984 | 6495260 |
| individual variations in color vision among squirrel monkeys (saimiri sciureus) of different geographical origins. | a forced-choice discrimination procedure was used to test color vision and visual sensitivity in 10 squirrel monkeys (saimiri sciureus) originating from three geographical locations (bolivia, colombia, guyana). in agreement with results from an earlier study of vision in squirrel monkeys of peruvian origin, striking individual variations in color vision were found among these squirrel monkeys. some of these animals had trichromatic color vision, while others were dichromats. within these two cat ... | 1984 | 6509903 |
| diarrhea in nonhuman primates: a survey of primate colonies for incidence rates and clinical opinion. | veterinary clinicians associated with 18 colonies of nonhuman primates were surveyed for their experience with diarrhea disease in colony animals for calendar year 1981. the 1981 diarrhea incidence rate, diarrhea-specific mortality rate and diarrhea case fatality rate for 13,385 monkeys were 10.6%, 1.2% and 11.1%, respectively. it was not possible to incriminate age or type of housing as risk factors for diarrhea, but some species seemed at greater risk than others. erythrocebus patas monkeys ha ... | 1984 | 6513506 |
| electroretinogram measurements of cone spectral sensitivity in dichromatic monkeys. | the corneal electroretinogram (erg) was used to investigate the spectral sensitivities of cones in 12 dichromatic squirrel monkeys (saimiri sciureus) whose color-vision capacities were established in behavioral tests. three different varieties of dichromacy were represented among these animals. a flicker-photometric procedure was used in which the erg response to a rapidly flickering monochromatic test light was compared with the response elicited by a similarly flickering reference light. the s ... | 1984 | 6520635 |
| brain irradiation: effects on regional mao and comt activity in the brain of the squirrel monkey and on the incorporation of [14c]tyrosine into catecholamines. | the effects of brain irradiation on the enzyme activity of monoamine oxidase (mao) and catecholamine o-methyltransferase (comt), as well as on the rate of incorporation of [14c]tyrosine into catecholamines (cas), were examined in brain regions of the squirrel monkey (saimiri sciureus). results indicated that proton irradiation of the striate visual cortex at either 10,000 or 20,000 rad drastically affected the mao activity, moderately affected the comt activity, and significantly altered the inc ... | 1984 | 6520885 |
| dimensional analysis and dynamic response characterization of mammalian peripheral vestibular structures. | extensive morphometric measurements were made on the vestibular system of the rabbit ( oryctulagus cuniculus), the gerbil (meriones unguiculatus), the chinchilla (chinchilla laniger ), and the squirrel monkey (saimiri sciureus) from serial sections of temporal bones. additionally, a more limited set of measurements were also completed on the owl monkey (aotus trivirgatus), the capuchin monkey (cebus sp.), the harp seal ( pagophilus groenlandicus erxleben , 1777), and the two-toed sloth ( choloep ... | 1984 | 6609629 |
| protective immunization of the squirrel monkey against asexual blood stages of plasmodium falciparum by use of parasite protein fractions. | we had previously shown that two polypeptides of plasmodium falciparum are preferentially recognized by antibodies of resistant squirrel monkeys saimiri sciureus. free parasites were isolated from synchronized cultures on human erythrocytes initially inoculated with infected saimiri erythrocytes. crude extracts were prepared from mature schizont stages and electrophoresed on preparative nadodso4/polyacrylamide gels. two groups of five monkeys were immunized with protein fractions eluted from the ... | 1984 | 6364136 |
| immunization against plasmodium falciparum asexual blood stages using soluble antigens. | saimiri sciureus monkeys have been successfully immunized against a human malaria parasite, plasmodium falciparum, using soluble antigens purified from schizont and merozoite extracts. high levels of antibodies reacting with schizont and merozoite specific polypeptides of 140 and 200 kdaltons were detected in the sera of protected monkeys. the five immunized monkeys survived a challenge infection with 5 x 10(7) parasites inducing a fulminant disease in control monkeys. | 1984 | 6370520 |
| immunohistochemical localization of corticotropin releasing factor (crf) in the hypothalamus of the squirrel monkey, saimiri sciureus. | corticotropin releasing factor immunoreactive (crf-ir) neuronal cell bodies and fibers have been localized in both the paraventricular and supraoptic nuclei of the hypothalamus of the squirrel monkey. the major projection from these nuclei is to the median eminence and neural stem. a few crf-ir fibers were found in the dorsal pars nervosa primarily adjacent to the pars intermedia. a rostral projection of crf-ir fibers is associated with the suprachiasmatic nucleus and continues to septal areas. ... | 1984 | 6384953 |
| types of synapses in the pallidum and their differential degeneration following lesions of pallidal afferents in squirrel monkey (saimiri sciureus). | 1984 | 6695596 | |
| minimal changes in hypothalamic temperature accompany microwave-induced alteration of thermoregulatory behavior. | this study probed the mechanisms underlying microwave-induced alterations of thermoregulatory behavior. adult male squirrel monkeys (saimiri sciureus), trained to regulate the temperature of their immediate environment (ta) behaviorally, were chronically implanted with teflon reentrant tubes in the medical preoptic/anterior hypothalamic area (po/ah), the brainstem region considered to control normal thermoregulatory processes. a vitek temperature probe inserted into the tube measured po/ah tempe ... | 1984 | 6712747 |
| hemobartonellosis in squirrel monkeys (saimiri sciureus) in a domestic breeding colony: case report and preliminary study. | infection with hemobartonella sp was diagnosed in a colony-born squirrel monkey with normocytic, normochromic anemia and pronounced punctate erythrocytic basophilic stippling on wright's-giemsa stained blood films. the diagnosis was confirmed using transmission electron microscopy. two randomly selected colony-born squirrel monkeys were splenectomized in an effort to activate and detect possible latent hemobartonellosis . one monkey became parasitemic 12 days following splenectomy. the second mo ... | 1984 | 6716965 |
| the effects of nutrition on unconjugated plasma bilirubin concentrations in squirrel monkeys. | bolivian squirrel monkeys (saimiri sciureus) have fasting unconjugated hyperbilirubinemia (males: 2.0 +/- 0.14; females: 3.0 +/- 0.26 mg per dl) which resembles that of humans with gilbert's syndrome. closely related brazilian squirrel monkeys have fasting levels (males: 0.29 +/- 0.045; females: 0.36 +/- 0.073 mg per dl) similar to normal people. the purpose of this study was to identify the underlying mechanisms and the nutritional factors involved. both bolivian and brazilian squirrel monkeys ... | 1984 | 6724513 |
| incomplete abortion and hydrometrosis in a squirrel monkey (saimiri sciureus). | a 6-year-old, primiparous female squirrel monkey, diagnosed as being at approximately 100 days of gestation, developed clinical signs of pregnancy toxemia. an ovariohysterectomy was performed and complete recovery followed supportive treatment. based on histopathology, a diagnosis of incomplete abortion and hydrometrosis was made. | 1984 | 6748607 |
| thermoregulatory adjustments in squirrel monkeys exposed to microwaves at high power densities. | the present study was undertaken to investigate the thermal adjustments of squirrel monkeys exposed in a cold environment to relatively high energy levels of microwave fields. the animals (saimiri sciureus) were equilibrated for 90 min to a cool environment (ta = 20 degrees c) to elevate metabolic heat production (m). they were then exposed for brief (10-min) or long (30-min) periods to 2,450-mhz continuous-wave microwaves. power densities (mpd) were 10, 14, 19, and 25 mw/cm2 during brief exposu ... | 1985 | 3836666 |
| distribution of neuropeptide y immunoreactivity in the basal forebrain and upper brainstem of the squirrel monkey (saimiri sciureus). | the distribution of neuropeptide y (npy) immunoreactivity in the brain of the squirrel monkey (saimiri sciureus) was studied by means of the indirect immunofluorescence, peroxidase-antiperoxidase, and avidin-biotin-complex methods. the antiserum used was raised in rabbits and did not show any significant crossreactivity with related peptides including peptide yy and avian pancreatic polypeptide. in the upper brainstem of the squirrel monkey a dense npy-immunoreactive terminal field is seen in la ... | 1985 | 3902914 |
| encephalitozoonosis in squirrel monkeys (saimiri sciureus). | twenty-two cases of naturally occurring encephalitozoonosis in squirrel monkeys are reported from breeding colonies of the delta regional primate research center, covington, la. characteristic foci of granulomatous inflammation and organisms were demonstrated in brains, kidneys, lungs, adrenals, and livers. vasculitis and perivasculitis were also common lesions in several organs. at least seven cases were congenital while ten others occurred in monkeys less than nine months old. granulomatous pl ... | 1985 | 3919491 |
| forced internal desynchronization between circadian temperature and activity rhythms in squirrel monkeys. | in an attempt to force internal desynchronization between the rest-activity rhythm and the body temperature rhythm of the squirrel monkey (saimiri sciureus), five animals were studied in a 14:14 light-dark cycle. in four animals a 28-h spectral component was found to predominate in the rest-activity rhythm, whereas an unentrained circadian component (tau = 25.9 +/- 0.4 h) predominated in the body temperature rhythm. plots of the cycle-by-cycle acrophases of the two rhythms confirm that they desy ... | 1985 | 3993815 |
| the laryngeal sensory pathway and its role in phonation. a brain lesioning study in the squirrel monkey. | in 10 squirrel monkeys (saimiri sciureus) uni- or bilateral lesions were placed in the nucl. solitarius, parabrachial nuclei, nucl. ventralis posterior medialis thalami or face area of primary sensory cortex. the effects of these lesions on vocalization were compared with those after transection of the internal branch of the superior laryngeal nerve. it was found that neither the cortical nor thalamic or parabrachial lesions changed the acoustic structure of vocalization. in contrast, destructio ... | 1985 | 4018191 |
| terminals of intralaminar thalamic neurons in the pallidum externum of saimiri sciureus. | stereotactic coagulations of intralaminar thalamic nuclei in 6 squirrel monkeys saimiri sciureus produced dark degenerations only of type iv synapses in pallidum externum, according to the classification of hassler and chung often preserving the slightly asymmetric contact and subsynaptic densities. other type iv boutons underwent semidark degeneration, whereas others showed crystalloid degeneration. some of type iv boutons show the deposition of many dense core vesicles and mitochondria with lo ... | 1985 | 4050302 |
| two types of trichromatic squirrel monkey share a pigment in the red-green spectral region. | microspectrophotometric measurements have been obtained for individual photoreceptors from four female squirrel monkeys (saimiri sciureus) that had been shown behaviourally to be trichromatic. relative to a normal human observer, two of the monkeys required more red light for a rayleigh match; the other two required more green light than a normal human observer. in the red-green spectral region, the first type of monkey was found to have two cone pigments with peak sensitivities at approximately ... | 1985 | 3832619 |
| a region of the herpesvirus saimiri genome required for oncogenicity. | herpesvirus saimiri naturally infects squirrel monkeys (saimiri sciureus) without producing signs of disease; infection of other new world primates, however, results in a rapidly progressing, malignant, t-cell lymphoma. results described in this report identify a region of the viral genome that is required for oncogenicity in owl monkeys (aotus trivirgatus); this region is not required for replication of the virus. this is believed to be the first such genomic region identified in a herpesvirus ... | 1985 | 2983431 |
| operant control of convective cooling and microwave irradiation by the squirrel monkey. | adult male squirrel monkeys (saimiri sciureus) were individually chair-restrained in an air-conditioned styrofoam box in the far field of a horn antenna. each monkey first received extensive training to regulate the temperature of the air circulating through the box by selecting between 10 and 50 degrees c air source temperatures. then, to investigate the ability of the animals to utilize microwaves as a source of thermalizing energy, 2450-mhz continuous wave microwaves accompanied by thermoneut ... | 1985 | 3836678 |
| interaction with objects by group-living saimiri sciureus. | we have studied the spontaneous interaction with small, inedible objects by group-living saimiri. twenty-one animals living in a large outdoor enclosure were presented with a set of 10 novel objects of diverse materials, colors, sizes, and shapes. we have used a sampling technique to record the number of monkeys interacting with each object; qualitative observations complemented these measurements. next day the same objects were presented again and the observations continued. this experiment was ... | 1985 | 3837910 |
| induction of protective immunity to plasmodium falciparum in saimiri sciureus monkeys with partially purified exoantigens. | soluble plasmodium falciparum exoantigens in crude culture supernatant fluids induced protective immunity against experimental falciparum malaria in bolivian saimiri sciureus monkeys. susceptible squirrel monkeys were vaccinated with an aluminum hydroxide-fortified fraction purified from culture supernatants of p. falciparum indochina i and geneve/sge-1 by cation-exchange (sulfopropyl-trisacryl) chromatography. animals immunized with sulfopropyl-purified and corresponding control immunogens were ... | 1985 | 3897052 |
| monoclonal antibodies produced against sporozoites of the human parasite plasmodium malariae abolish infectivity of sporozoites of the simian parasite plasmodium brasilianum. | we have used a sporozoite neutralization assay to define the biological relevance of the cross-reactivity of two monoclonal antibodies, raised against sporozoites of the human parasite plasmodium malariae (uganda 1/cdc), with sporozoites of the simian parasite plasmodium brasilianum (colombian). in vitro incubation of each of these two monoclonal antibodies with sporozoites of p. brasilianum totally abolished the infectivity of these parasites for saimiri sciureus. using western blot analysis an ... | 1985 | 3899939 |
| distribution of enkephalin-immunoreactive neurons in the forebrain and upper brainstem of the squirrel monkey. | the distribution of enkephalin-immunoreactive neuronal profiles in the forebrain and upper brainstem of the squirrel monkey (saimiri sciureus) was studied by means of the indirect immunofluorescence method. numerous enkephalin-immunoreactive cell bodies and fibers were disclosed in various regions including cerebral cortex, hippocampus, caudate nucleus, putamen, nucleus accumbens, septal area, olfactory tubercle, substantia innominata, amygdala, various hypothalamic and thalamic nuclei, periaque ... | 1985 | 3907752 |
| colonic mucin composition in primates. selective alterations associated with spontaneous colitis in the cotton-top tamarin. | heterogeneity of colonic mucin glycoprotein was examined in rectal mucosal biopsy specimens from a variety of primate species (saguinus oedipus, n = 18; macaca mulatta, n = 2; macaca fascicularis, n = 2; aotus trivirgatus, n = 2; saimiri sciureus, n = 2; and callithrix jacchus, n = 2). after initial separation of radiolabeled mucin and nonmucin glycoproteins solubilized from mucosal biopsy specimens, at least five labeled mucin components were found in monkey rectal mucosa in contrast to the six ... | 1985 | 3917260 |
| induction of follicular growth in the squirrel monkey (saimiri sciureus) with human urinary follicle-stimulating hormone (metrodin). | human urinary follicle-stimulating hormone (metrodin, serono laboratories, inc., randolph, ma), an investigational drug which is purified from human menopausal gonadotropin (hmg) (pergonal, serono laboratories, inc.), was tested for its effects on induction of follicle development in the squirrel monkey (saimiri sciureus). metrodin was as effective as hmg for induction of follicle development in the squirrel monkey, and it appeared to be superior to hmg or porcine follicle-stimulating hormone at ... | 1985 | 3922805 |
| lipid composition of squirrel monkey (saimiri sciureus) saliva. | the content and composition of lipids in saliva of healthy caries-free squirrel monkeys were investigated. the dialyzed and lyophilized saliva on extraction with chloroform/methanol yielded 8.0 +/- 0.9 mg of lipids/100 ml of saliva. following fractionation on silicic acid column, 30.9% of lipids were found in the neutral lipid fraction, 58.8% in the glycolipid fraction, and 10.3% in the phospholipid fraction. the neutral lipids exhibited high content of free fatty acids (58.8%) and triglycerides ... | 1985 | 3930141 |
| development of dipetalonema gracile in the squirrel monkey (saimiri sciureus), with notes on its biology. | infective larvae of dipetalonema gracile, which had developed in culicoides hollensis, were inoculated into 4 laboratory-born squirrel monkeys, saimiri sciureus. weekly blood sampling revealed the mean prepatent period to be 297 days. all 4 monkeys developed patent infections in which peak microfilaremias were reached 13 to 18 wk after patency. two laparotomies, performed at 27 and 64 wk, were conducted to evaluate pathological involvement and, at that later time, to recover adult parasites. sli ... | 1985 | 3981344 |
| color vision in squirrel monkeys: sex-related differences suggest the mode of inheritance. | behavioral tests of vision in squirrel monkeys (saimiri sciureus) reveal that there are widespread individual variations in color vision in this species. the variation has a sex-related component: whereas both trichromatic and dichromatic color vision occurs among female monkeys, males appear exclusively dichromatic. this finding suggests that, unlike humans, squirrel monkeys have only a single photopigment locus on the x chromosome. | 1985 | 3984212 |
| [2 new filariae of a monkey, saimiri sciureus, in guyana]. | description of two new filariae, parasites of saimiri sciureus l. (georgetown type, karyotype 14/7) from guyana. dipetalonema robini n. sp., fourth species of the genus, is frequent and associated with the morphologically similar species, d. gracile (rud., 1809); d. robini differs from d. gracile by structure of caudal lappets of female, vagina, microfilaria and area rugosa. the second filaria, also frequent, belongs to the subgenus tetrapetalonema which contains a dozen species; mansonella (t.) ... | 1985 | 3985534 |
| chemotherapy of visceral leishmaniasis (leishmania donovani) in the squirrel monkey (saimiri sciureus). | the relationship of the numbers of amastigotes in the liver to the duration of infection with two lines of a khartoum strain of leishmania donovani [designated the parent (p) line and the meglumine antimoniate (glucantime) resistant (mar) line] and the effect of meglumine antimoniate on these two lines of leishmania were studied in the squirrel monkey. all experimental monkeys were inoculated via the saphenous vein with 32.5 x 10(6) amastigotes (per kg body weight), obtained from heavily-infecte ... | 1985 | 3985702 |
| dietary fat unsaturation enhances drug metabolism in cebus but not in squirrel monkeys. | antipyrine disappearance and sleeping time following barbiturate anesthesia were assessed to evaluate the effects of dietary corn oil and coconut oil on the drug-metabolizing enzyme systems (dmes) in cebus (cebus albifrons) and squirrel (saimiri sciureus) monkeys. plasma antipyrine clearance (half-life) was measured in both species before and after induction of dmes by i.v. injection of barbiturates on two consecutive days. sleeping time was measured after administration of either pentobarbital ... | 1985 | 3998859 |
| characterization of gilbert-like syndrome in squirrel monkeys (saimiri sciureus). | bolivian squirrel monkeys, unlike those of brazilian origin, exhibit a marked fasting hyperbilirubinemia (fh) similar to that observed in gilbert's syndrome in man. since no delays in the hepatic clearance of sulfobromophthalein or indocyanine green are present, the bolivian monkey appears to be similar to gilbert's type i syndrome. fh can be significantly decreased by either phenobarbital or tin-protoporphyrin pretreatment. nicotinic acid-induced hyperbilirubinemia and delayed tolbutamide clear ... | 1985 | 3999115 |
| indigenous intravaginal pentatrichmonads vitiate the usefulness of squirrel monkeys (saimiri sciureus) as models for trichomoniasis in men. | 1985 | 4007864 | |
| hematologic values of normal bolivian squirrel monkeys (saimiri sciureus): a comparison between wild-caught and laboratory-bred male animals. | complete and differential blood counts were conducted on 23 male squirrel monkeys (saimiri sciureus) of bolivian origin. the sample included 9 laboratory-bred and 14 wild-caught adult monkeys weighing between 600 and 1,500 g. the means of total white blood cell (wbc) counts, total hemoglobin and hematocrits of laboratory-bred animals were found to be significantly different from those of wild-caught monkeys (p less than 0.01). other hematologic parameters showed no significant differences betwee ... | 1985 | 4043872 |
| measurement of squirrel monkey serum igg levels by a two-site sandwich radioimmunoassay with monoclonal antibodies. | monoclonal antibodies against the squirrel monkey saimiri sciureus igg have been produced for a more specific analysis of the antibody-related immunological aspects in experimental human or monkey malaria. two monoclonal antibodies, 3d8/d5 and 3f11/g10, out of 64 reacted with distinct epitopes on the igg present throughout the complete population without interfering with each other. the 2 monoclonal antibodies were used to develop a highly specific, reliable and sensitive two-site sandwich radio ... | 1985 | 4045202 |
| pentastomid nymph from the brain of a squirrel monkey (saimiri sciureus). i. morphology of the nymph. | a pentastomid nymph of the genus porocephalus was identified following its removal from the brain-meningeal interface of a squirrel monkey, saimiri sciureus. it was characterized by two inner and two outer hooks adjacent to the mouth opening, the presence of accessory lobes (or spines) on the outer hooks, a vertical slit-like mouth opening surrounded by a u-shaped conformation of integument, and annulation of the body surface. stigmata, representing the openings of integumental chloride cells, w ... | 1985 | 4046003 |
| pentastomid nymph from the brain of a squirrel monkey (saimiri sciureus). ii. morphology of the host response. | a porocephalus nymph found in the meninges of a squirrel monkey was encapsulated by connective tissue cells and fibrils presumably derived from the pia mater. the capsule was composed of an inner layer (il) adjacent to the nymphal integument and an outer layer (ol) adherent to the brain surface. separating the two layers was a capsular space. the il was lined by a granular material adjacent to the nymph surface and possessed impressions of annulae and the apical pits of chloride cells. the surfa ... | 1985 | 4046004 |
| culture of atrial and ventricular cardiac muscle cells from the adult squirrel monkey saimiri sciureus. | atrial and ventricular cardiac muscle cells isolated from the adult squirrel monkey saimiri sciureus were cultured and characterized by light and transmission electron microscopy (tem). freshly isolated cells were striated and cylindrical in shape and, when placed in culture, rounded up and lost their highly organized morphology. with prolonged time in culture, they spread out on the surface of the culture flask and reacquired many of the internal ultrastructural characteristics of their in vivo ... | 1985 | 4054237 |