Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| the second somatic sensory area (smii) of opossum neocortex. | organization of the neocortical second somatic sensory area (smii) of anesthetized virginia opossums has been examined utilizing micro-electrode recording techniques. smii is situated between the first somatic sensory area (smi) medially, and the rhinal fissure laterally. the head representation is located anteromedially within smii, and the hindlimb representation posterolaterally, with the forelimb representation in between. approximately 49% of smii is devoted to representation of the head, 3 ... | 1977 | 864034 |
| the organization of reticulo-olivo-cerebellar circuits in the north american opossum. | by employing the autoradiographic method we have determined that the inferior olivary nucleus receives input from the reticular formation of the midbrain, pons and, probably, the medulla. the remarkable thing about such connections is that they are not diffuse, but targeted in large part on restricted portions of the caudal acessory nuclei. from our previous studies it is clear that some of the olivary regions receiving reticular input also receive projections from the cerebral cortex, the spina ... | 1977 | 589453 |
| ventilatory effects accompanying spontaneous movement in the suckling opossum. | to determine whether spontaneous movement was associated with an organized respiratory response during early stages of mammalian development, we studied immature suckling opossums (didelphis virginiana) between 30 and 60 days of age. rate and depth of breathing were measured using pressure plethysmography and movement was assessed using electromyography of neck muscles. during air-breathing as well as during ventilatory chemostimulation with hypoxic, hypercapnic, and asphyxiant test gases, the o ... | 1977 | 597380 |
| the lateral reticular nucleus of the opossum (didelphis virginiana). ii. connections. | 1977 | 864033 | |
| the lateral reticular nucleus of the opossum (didelphis virginiana). i. conformation, cytology and synaptology. | 1977 | 864031 | |
| resistance of the opossum (didelphis virginiana) to envenomation by snakes of the family crotalidae. | 1977 | 841589 | |
| cellular mechanisms involved in cyclic stromal renewal of the uterus. i. the opossum, didelphis virginiana. | at the close of a uterine cycle, the remodelling of the endometrial stroma of the north american opossum involves removal of extracellular material by macrophages. this study provides cytochemical and ultrastructural evidence which indicates that the laden macrophages are eliminated from the endometrium through emigration across the glandular and luminal epithelia. during diestrus or the early postpartum period, the abundant uterine glands relinguish their secretory function to acquire a transie ... | 1976 | 1252015 |
| high tolerance to snake venom by the virginia opossum, didelphis virginiana. | 1976 | 960117 | |
| fine structure of the retinal epithelium and tapetum lucidum of the opossum (didelphis virginiana). | the fine structure of the retinal epithelium has been studied by electron microscopy in the opossum (didelphis virginiana). the retinal epithelium, over most of the retina, is typical of that in other vertebrates and consists of a single layer of heavily pigmented, cuboidal cells. these cells display extensive basal (scleral) infoldings and numerous apical (vitreal) processes which enclose photoreceptor outer segments. a semicircular area of the retinal epithelium in the superior fundus is furth ... | 1976 | 966288 |
| hemoglobins of the opossum (didelphis virginiana kerr). i. developmental changes from yolk sac to definitive erythropoiesis. | in 5- to 7-da old opossum pouch young, hemoglobins were observed. the "primitive" species i, ii, and iv were shown to be electrophoretically distinct from the adult hemoglobin iii. hemoglobin i was detectable until the 7th postnatal da. hemoglobins i, ii, and iv were detected only during the period when yolk sac-derived primitive erythroblasts were seen in circulation, ei, until the 13th postnatal da, but in decreased amounts from the 6th to 13th da. the electrophoretic pattern of hemoglobin of ... | 1976 | 1271732 |
| laterality and topography of cerebellar cortical efferents in the opossum (didelphis marsupialis virginiana). | 1976 | 1268704 | |
| cerebello-olivary fibers: their origin, course and distribution in the north american opossum. | although degeneration techniques suggest that cerebello-olivary fibers are limited in their origin and distribution, horseradish peroxidase and autoradiographic experiments make it clear that they arise within all cerebellar nuclei and project to most, if not all, areas of the contralateral inferior olive. autoradiographic preparations show that cerebello-olivary fibers are highly ordered and suggest that the dentate nucleus projects primarily to the principal olive, the interpositus anterior re ... | 1976 | 1253856 |
| opossum somatic sensory cortex: a microelectrode mapping study. | organization of opossum somatic sensory cortex has been investigated utilizing closely spaced microelectrode penetrations (0.25-0.5 mm apart) and delicate mechanical stimulation of body surfaces including the facial vibrissae. results may be summarized as follows: (1) the general organization of somatic sensory cortex, as originally defined by lende ('63a) has been confirmed; (2) a double representation of the contralateral mystacial vibrissae and rhinarium, implicit in lende's original data, wa ... | 1976 | 1245614 |
| retinofugal pathways in two marsupials. | autoradiographic and anterograde degeneration tracing methods were used to study and compare the organization of retinofugal pathways in two marsupial opossums, didelphis virginiana and marmosa mitis. seven identical retinal targets were demonstrated for each opossum. these include: (1) the suprachiasmatic nucleus of the hypothalamus, (2) the dorsal and (3) ventral lateral geniculate nuclei, (4) the lateral posterior nucleus, (5) the pretectal complex, (6) the superior colliculus and (7) the acc ... | 1976 | 993375 |
| primary isolation of mycobacterium avium complex-serotype 6 on blood agar. | mycobacterium avium complex-serotype 6 was isolated in pure culture on blood agar plates from inocula taken from the heart blood, lungs, liver, kidneys, and spleen of a naturally infected captive female opossum (didelphis marsupialis virginiana). repeat cultures from stored tissues and transfer of colonies from original blood agar plates revealed that the mycobacterium grew on tryptose, brilliant green, eosin-methylene blue. sabouraud glucose, and mycobiotic agar plates and in fletcher leptospir ... | 1976 | 972192 |
| observations on the involvement of wildlife in an epornitic of chlamydiosis in domestic turkeys. | in an investigation of potential wildlife reservoirs of chlamydia psittaci at the site of an acute, highly fatal epornitic of chlamydiosis in domestic turkeys in texas, various species of wild birds and rodents were captured and tested for chlamydial serum antibodies and chlamydiae in their tissues. thirteen (65%) of 20 blackbirds (agelaius sp), 4 (44%) of 9 killdeer (oxyechus vociferus), 3 (27%) of 11 sparrows (passer sp) and 1 of 4 mourning doves (zenaidura macroura) were seropositive, but chl ... | 1976 | 988009 |
| the amino-acid sequence of the alpha-crystallin a chains of red kangaroo and virginia opossum. | the amino acid sequence of the a chain of the eye lens protein alpha-crystallin from the red kangaroo (macropus rufus) was completely determined by manual edman degradation of tryptic, thermolytic and cyanogen bromide peptides. the sequence of the alpha-crystallin a chain from the virginia opossum (didelphis marsupialis) was deduced from amino acid analyses and partial edman degradation of peptides. the 173-residue a chains of kangaroo and opossum differ in six positions, whereas comparison with ... | 1976 | 964255 |
| frequency of sarcocystis spp in detroit, metropolitan area, michigan. | a survey of sarcocystis spp in feral animals and in domesticated animals slaughtered in detroit, mi, was undertaken during a 6-month period, april to september, 1973, using histologic and digestion diagnostic techniques. results indicated 75.3% of 789 sheep and 10.8% of 306 lambs were infected. infection in young and adult sheep was low in april (0% of 78 lambs and 6.7% of 62 adult sheep), but increased in july (24% of 90 lambs and 94.1% of 201 adult sheep). high frequency of sarcocystis in summ ... | 1975 | 803806 |
| vaccination of foxes against rabies using ingested baits. | a method for immunizing foxes against rabies was evaluated. fifteen of 36 red foxes (vulpes fulva) fed baits impregnated with modified live virus rabies vaccine developed serum rabies neutralizing antibody. the vaccine-bait proved unstable when held at 4 c or 25 c for 96 hours prior to feeding. for safety testing the vaccine virus was administered to opossums (didelphis virginiana), cotton rats (sigmodon hispidus), hamsters (mesocricetus auratus), and chickens (gallus domesticus) in either liqui ... | 1975 | 1097743 |
| biosynthesis and secretion of testosterone by adrenal tissue from the north american opossum, didelphis virginiana, and the effects of tropic hormone stimulation. | 1975 | 173619 | |
| corticobulbar fibres in the north american opossum (didelphis marsupialis virginiana) with notes on the tasmanian brust-tailed possum (trichosurus vulpecula) and other marsupials. | corticobulbar projections have been studied in the american opossum by both degeneration and autoradiographic methods and, for the most part, the results confirm our earlier observations (martin & west, 1967; martin, 1968). however, we have obtained evidence for certain connexions not previously described and have delineated the origin(s) of several connexions more precisely by paying particular attention to the degeneration present at thalamic levels in all cases and by the use of autoradiograp ... | 1975 | 1213949 |
| leptospirosis in wildlife in brazil: isolation of a new serotype in the pyrogenes group. | a new leptospiral serotype in the serogroup pyrogenes is described. the strain was isolated from one gray "four-eyed" opossum (philander opossum). it is proposed that the serotype be designated guaratuba, strain an-7705. the isolations of serotypes ballum from the south american field mouse (akodon arviculoides), szwajizak and icterohaemorrhagiae from the north american opossum (didelphis marsupialis), and grippotyphosa from many other wild animal species as well as domesticated animals are also ... | 1975 | 1163877 |
| the inferior olivary nucleus of the opossum (didelphis marsupialis virginiana), its organization and connections. | although the inferior olivary nucleus of the opossum is small, sections stained either for nissl substance, normal axons or cholinesterase activity reveal distinct medial, dorsal and principal nuclei. the medial nucleus contains three major subdivisions (labelled a, b, c after bowman and sladek, '73) and a group of neurons which is comparable to the cap of kooy. in contrast to the cat and monkey, the major portion of the "medial" nucleus (subgroup a) lies lateral to the principal nucleus in rost ... | 1975 | 1123465 |
| a field study of anatrichosoma infections in the opossum, didelphis virginiana. | 1975 | 1165567 | |
| spectrophotometric measurement of hemoglobin oxygen saturation in the opossum didelphis virginiana. | 1975 | 234330 | |
| development of the neonate opossum (didelphis virginiana). | this study describes the postnatal growth and development of the opossum (didelphis virginiana). measurements were made weekly on 6 young opossums between 50 and 189 days following birth. these measurements included: total length, length of ear and tail, and length of front and rear appendages. body weight measurements were extended to 233 days. the mean body weight at 50 days was 14.1 g, which increased rapidly to 2,560 g at 233 days. | 1975 | 1182241 |
| pre- and postnatal development of lactate and malate dehydrogenases in the marsupial didelphis marsupialis virginiana. | 1975 | 1237386 | |
| the primary structure of the myoglobin of didelphis marsupialis (virginia opossum). | 1975 | 1164514 | |
| methods for obtaining neonates of known age from the virginia opossum (didelphis marsupialis virginiana). | postlactational estrus occurred in the opossum 6-17 da (mean 10.08 +/- 3.2da) after sucklings were removed from the pouch 1-60 da postpartum. this estrus occurred somewhat earlier in females whose young were removed later than 24 hr postpartum, rather than within the first 24 hr. thirteen litters (37% conception) resulted from 35 initial attempts at breeding during postlactational estrus. three of 5 females conceived when litters were removed twice in succession. the tendency forindividual femal ... | 1975 | 1152417 |
| primary afferent fiber distribution at brachial and lumbosacral spinal cord levels in the opossum (didelphis marsupialis virigniana). | this paper describes the spinal cord distribution of primary afferent fibers from forelimb and hindlimb in the north american opossum. fibers entering the cord distribute to all ipsilateral laminae (i-ix) within their segment of entry, often have a small crossed projection to the contralateral dorsal horn, and extend as well into adjacent segments of lumboseacral and cervical enlargements. segmentally derived afferents have a longitudinal extent of up to 10 segments into laminae vi and vii, of 5 ... | 1975 | 1225464 |
| uterine proteins in the marsupial, didelphis marsupialis virginiana, during gestation. | 1975 | 1110467 | |
| cortical and brain stem projections to the spinal cord of the american opossum, didelphis marsupialis virginiana. | the present report describes the results of experiments designed to study supraspinal systems in the american opossum by several techniques. the data indicate that although spinal fibers from the opossum motor-sensory cortex are small and limited in their distribution, those from the brain stem are comparable in their origin, course, caudal extent and distribution to those described for placental mammals. such results support the use of the opossum as an experimental animal for nervous system re ... | 1975 | 1225466 |
| megakaryocytopoiesis in the liver of the developing opossum (didelphis virginiana). | the development of hepatic megakaryocytes has been examined in the livers of 35 young opossums at four different stages of postnatal development. megakaryocytopoiesis is carried out within the sinusoidals and there appears to be a close relationship between the young megakaryocytes and the sinusoid lining cells. megakaryocytes in the opossum are relatively small and lack the degree of nuclear complexity seen in other species. both the nucleus and the cytoplasm undergo sequential maturational cha ... | 1975 | 1201961 |
| the postnatal development of the liver in a marsupial, didelphis virginiana. 2. electron microscopy. | the postnatal development of the liver has been examined with the electron microscope in 15 groups of young opossums. at birth, hepatic cells show little organization and large islands of haemopoietic elements occur between clusters of hepatic cells. hepatocytes appear small and contain an abundance of granular endoplasmic reticulum. the cytoplasm is also characterized by scattered lipid droplets of varying sizes. canaliculi occasionally are found between hepatocytes. only a few scattered lining ... | 1975 | 1184456 |
| proceedings: control of steroidogenesis in adrenal tissue from the developing opossum, didelphis marsupialis virginiana. | 1974 | 4374480 | |
| ovariectomy during gestation in the american opossum, didelphis marsupialis virginiana. | 1974 | 4853513 | |
| the erythrocyte life span in the american opossum (didelphis marsupialis virginiana). | 1974 | 4365338 | |
| effects of incubation temperature on the kinetics of cultured lymphocytes from the opossum, didelphis virginiana. | 1974 | 4435132 | |
| the opossum (didelphis virginiana kerr) as a biomedical model. ii. breeding the opossum in captivity: facility design. | 1974 | 4362894 | |
| the opposum (didelphis virginiana kerr) as a biomedical model. i. research perspective, husbandry, and laboratory technics. | 1974 | 4362893 | |
| eimeria indianensis sp. n. and an isospora sp. from the opossum didelphis virginiana (kerr). | 1974 | 4817974 | |
| acquired immunity in opossum (didelphis virginiana) embryos. | 1974 | 4133078 | |
| pasteurella multocida infection in the opossum (didelphis virginiana). | 1974 | 4374598 | |
| induction of a chronic somatosensory epilepsy in the opossum (didelphis virginiana kerr) with an inhibitor of cholesterol biosynthesis. | 1973 | 4798641 | |
| methylcholanthrene carcinogenesis in the north american opossum (didelphis virginiana). | 1973 | 4745856 | |
| the postnatal development of the liver in a marsupial, didelphis virginiana. 1. light microscopy. | 1973 | 4762131 | |
| the adrenergic control of lower esophageal sphincter function. an experimental model of denervation supersensitivity. | to evaluate the adrenergic regulation of lower esophageal sphincter (les) function, les pressure, les relaxation during swallowing, and blood pressure were measured in the anesthetized opossum, didelphis virginiana, during intravenous administration of alpha and beta adrenergic agonists and antagonists. studies were done in controls and animals adrenergically denervated with 6-hydroxydopamine. alpha adrenergic agonists (norepinephrine, phenylephrine) increased les pressure and blood pressure, wh ... | 1973 | 4727458 |
| diel temperature fluctuations of the virginia opossum (didelphis virginiana). | 1973 | 4744938 | |
| cell cycle determination of phytohemagglutinin-stimulated lymphocytes from the opossum, didelphis virginiana. | 1973 | 4708350 | |
| somatotopic organization related to nuclear morphology in the cuneate-gracile complex of opossums didelphis marsupialis virginiana. | 1973 | 4706006 | |
| basal-cell tumor in a virginia opossum (didelphis marsupialis). | 1973 | 4351486 | |
| the motor nucleus of the facial nerve in the opossum (didelphis marsupialis virginiana). its organization and connections. | 1973 | 4784296 | |
| an experimental light and electron microscopic study of cerebellorubral projections in the opossum, didelphis marsupialis virginiana. | 1973 | 4700724 | |
| convergent projection of three separate thalamic nuclei on to a single cortical area. | three distinct sensory-motor nuclei in the thalamus project to parietal cortex in the virginia opossum; the ventral posterior nucleus receives inputs from somatic sensory structures and projects to layers iv and iii, the ventral anterolateral nucleus receives inputs from motor structures and projects to layers iv and iii and inner i, and the central intralaminar nucleus receives inputs from sensory, motor, and other structures and projects to layers vi through outer i. the physiologically define ... | 1973 | 4683125 |
| thalmocortical projections from the mediodorsal nucleus in the virginia opossum. | 1973 | 4121726 | |
| distribution of cerebellar and somatic lemniscal projections in the ventral nuclear complex of the virginia opossum. | 1973 | 4709264 | |
| development of pulmonary reflexes and pattern of breathing in virginia opossum. | 1972 | 5063396 | |
| development of the chemical control of breathing in the virginia opossum. | 1972 | 5024173 | |
| a light and electron microscopic study of corticorubral projections in the opossum, didelphis marsupialis virginiana. | 1972 | 5028528 | |
| interpretation of sex chromosomal rna synthesis in the opossum, didelphis virginiana. | 1972 | 4653583 | |
| central distribution of primary afferent fibers of the glossopharyngeal and vagal nerves in the opossum, didelphis virginiana. | 1972 | 5075701 | |
| contribution of neocortex to sound localization in opossum (didelphis virginiana). | 1972 | 5029954 | |
| characteristics of common helminths of the virginia opossum (didelphis virginiana) from north carolina. | 1972 | 4336985 | |
| administration of test materials to the neonatal north american opossum (didelphys marsupialis virginiana kerr). | 1971 | 4329243 | |
| sedation and anesthesia of the virginia opossum, didelphis virginiana. | 1971 | 4329235 | |
| the habituation of auditory reflexes in the decorticate opossum (didelphis virginiana). | 1971 | 5148514 | |
| experimental study of pulmonary adenomas in the opossum (didelphis virginiana). | 1971 | 4325695 | |
| reticulospinal fibers of the opossum, didelphis virginiana. ii. course, caudal extent and distribution. | 1971 | 4101680 | |
| reticulospinal fibers of the opossum, didelphis virginiana. i. origin. | 1971 | 4101679 | |
| the pouch gas of the virgina opossum (didelphis virginiana). | 1971 | 5552772 | |
| a stereotaxic atlas of the opossum brain (didelphis virginiana). | 1971 | 4950276 | |
| a stereotaxic atlas of the opossum brain (didelphis virginiana). | 1971 | 4940387 | |
| spino-cerebellar fibers of the opossum didelphis marsupialis virginiana. | 1971 | 5289710 | |
| the red nucleus of the opossum (didelphis marsupialis virginiana): a light and electron microscopic study. | 1971 | 5148971 | |
| didelphonema longispiculata (hill, 1939) wolfgang, 1953 (nematoda: spiruroidea) and other helminths from the opossum (didelphis marsupialis virginiana) in georgia. | 1971 | 5090983 | |
| experimental bacterial endocarditis in the opossum (didelphis virginiana). 3. comparison of spontaneously occurring endocarditis with that induced experimentally by pyogenic bacteria and fungi. | it was possible to induce bacterial endocarditis in opossums with single intravenous injections of streptococcus viridans or staphylococcus aureus. fiftyeight percent of those animals given streptococcus viridans developed bacterial endocarditis in which most of the lesions were on the left side of the heart. the experimentally induced streptococcal disease was similar to that which may occur spontaneously in opossums, both with respect to the distribution and structure of the vegetations. singl ... | 1971 | 5133514 |
| morphology of neuroglia in the hypothalamus of the opossum (didelphis virginiana), armadillo (dasypus novemcinctus mexicanus) and cat (felis domestica). | 1971 | 4944389 | |
| the contribution of the dorsal lateral geniculate nucleus to the total pattern of thalamic terminations in striate cortex of the virginia opossum. | 1971 | 5148973 | |
| the areas and layers of corticocortical terminations in the visual cortex of the virginia opossum. | 1971 | 5541350 | |
| the immune response of adult opossums (didelphis virginiana) to the bacteriophage f2. | 1970 | 5416636 | |
| experimental bacterial endocarditis in the opossum (didelphis virginiana). ii. induction of endocarditis with a single injection of streptococcus viridans. | 1970 | 5433712 | |
| experimental bacterial endocarditis in the opossum (didelphis virginiana). i. valvular changes following a single injection of bacteria in unmodified adult opossums. | 1970 | 5437267 | |
| the cytoarchitecture of somatic sensory-motor cortex in the opossum (didelphis marsupialis virginiana): a golgi study. | 1970 | 5473290 | |
| urea, electrolyte and total solute excretion following water deprivation in the opossum (didelphis marsupialis virginiana). | 1970 | 5426567 | |
| the venous system of the head and neck of the opossum (didelphis virginiana). | 1970 | 5522110 | |
| late dna replication in the sex chromosomes of didelphis virginiana. | 1970 | 5452039 | |
| rna synthesis in the sex chromosomes of the opossum, didelphis virginiana. i. female. | 1970 | 5452038 | |
| rubrobulbar projections of the opossum (didelphis virginiana). | 1970 | 5422531 | |
| receptive fields of single cells of a marsupial visual cortex of didelphis virginiana. | 1970 | 5412291 | |
| the rubro-spinal tract of the opposum (didelphis virginiana). | 1970 | 5412717 | |
| hypertension in the opossum didelphis virginiana. | 1970 | 5409896 | |
| a further study of adrenal function in the opossum (didelphis virginiana). | 1969 | 5403614 | |
| preliminary estimates of the mean duration of the s-phase in the opossum, didelphis virginiana. | 1969 | 5347641 | |
| temperature regulation in the opossum, didelphis marsupialis virginiana. | 1969 | 5392911 | |
| pulmonary adenomatosis in opossums (didelphis virginiana). | 1969 | 4310335 | |
| a review of the anatomy and neurophysiology of the opossum (didelphis virginiana) visual system. | 1969 | 4894785 | |
| blood chemical and hematological studies in the laboratory-confined, unanesthetized opossum, didelphis virginiana. | 1969 | 4240125 | |
| efferent tectal pathways of the opossum (didelphis virginiana). | 1969 | 5780528 | |
| the opossum, didelphis virginiana, as a laboratory animal. | 1969 | 4240729 | |
| the distribution and control of osmosensitive cells within the hypothalamus of the opossum (didelphis virginiana). | 1969 | 4889623 |