| [mechanical characteristics of the myocardium of the sloth (bradypus tridactylus)]. | | 1979 | 162510 |
| pneumocystis and histoplasma infections in wild animals from the amazon region of brazil. | routine examination of tissues from wild forest rodents from amapá, north brazil, revealed pneumocystis carinii in lung smears from a newly captured oryzomys capito (cricetidae). acute, fatal infections with this parasite are also recorded in a number of captive "coatimundis", nasua narica (carnivora: procyonidae) and a sloth, bradypus tridactylus (edentata). pneumocystis was also encountered in lung smears from a newly captured and apparently healthy sloth, choloepus didactylus. the presence of ... | 1975 | 1084602 |
| cutaneous leishmaniasis of man due to leishmania (viannia) shawi lainson, de souza, póvoa, ishikawa & silveira, in pará state, brazil. | leishmania (viannia) shawi lainson, braga, de souza, póvoa, ishikawa & silveira, 1989, was originally recorded from monkeys (cebus apella and chiropotes satanas), sloths (choloepus didactylus and bradypus tridactylus) and coatis (nasua nasua) and the sandfly, lutzomyia whitmani. with a panel of leishmania specific monoclonal antibodies, it was found that 30.5% of the leishmania strains from patients, who had contracted cutaneous leishmaniasis in pará state, were similar, but not identical to l. ... | 1991 | 1822654 |
| leishmania (viannia) shawi sp. n., a parasite of monkeys, sloths and procyonids in amazonian brazil. | leishmania (viannia) shawi sp. n., is described from the monkeys cebus apella and chiropotes satanus, the sloths choloepus didactylus and bradypus tridactylus, the procyonid nasua nasua, and the phlebotomine sandfly lutzomyia whitmani, all from primary forest in the state of pará, north brazil. l. (v.) shawi is variably distinguished from all other known species within the subgenus viannia by a combination of biological, biochemical and serological characters, as revealed by studies on morpholog ... | 1989 | 2504099 |
| the primary structure of pale-throated three-toed sloth (bradypus tridactylus, xenarthra) hemoglobin. | the hemoglobin of the pale-throated three-toed sloth (bradypus tridactylus, xenarthra) was separated into two components (ratio 4:1) with identical amino-acid analyses for the alpha- and beta-chains. the primary structures of both chains from the major component are given. they could be isolated by chromatography on carboxymethyl cellulose cm-52. the sequences have been determined by automatic edman degradation of the native chains and their tryptic peptides. the comparison with human hemoglobin ... | 1989 | 2757790 |
| ventricular fibrillation threshold in the three-toed sloth (bradypus tridactylus). | the ventricular fibrillation threshold (vft) can be defined as the minimum electrical value able to trigger fibrillation. the objective was to determine the threshold fibrillatory current in the three-toed sloth, animal which may show spontaneous defibrillation. ten specimens were used (average weight 3.9 kg, sd 0.28). two electrodes of the spoon type were laterally applied to the ventricles, stimulating with a nonsynchronized train of rectangular pulses, variable amplitude, until fibrillation w ... | 1984 | 6241785 |
| vertebrate hosts and vectors of trypanosoma rangeli in the amazon basin of brazil. | a total of 46 trypanosoma rangeli stocks were isolated from naturally infected mammals and triatomine vectors. twenty-two stocks were from the common opossum (didelphis marsupialis), one from the brown "4-eyed" opossum (metachirus nudicaudatus), one from the anteater (tamandua tetradactyla), one from the coati (nasua nasua), seven from rhodnius pictipes and 14 from rhodnius robustus. two stocks were also isolated from recently fed sandflies (lutzomyia sp., shannoni group). the stocks were identi ... | 1983 | 6418015 |
| trypanosomatidae from wild mammals in the neotropical rainforest of french guiana. | the initial filling of the reservoir behind the petit saut hydro-electric dam, on the sinnamary river in french guiana, threatened the terrestrial and arboreal animals living in the neotropical rainforest being flooded. during a rescue programme between 24 october and 12 november in 1994, many of these animals were checked for infection with trypanosomatids. overall, 45 blood samples and 54 skin biopsies were collected from 53 mammals (of 13 species representing five orders) and blood samples we ... | 2001 | 11299122 |
| acute disseminated toxoplasmosis in a captive three-toed sloth (bradypus tridactylus). | fatal toxoplasmosis was diagnosed in a captive three-toed sloth (bradypus tridactylus), an arboreal species of the tropical rainforests of south and central america. in view of its specialized lifestyle and ecosystem and its low metabolic rate, b. tridactylus would seem to warrant further investigation in respect of its susceptibility to toxoplasma gondii. | 2001 | 11578142 |
| brazilian distribution of amblyomma varium koch, 1844 (acari: ixodidae), a common parasite of sloths (mammalia: xenarthra). | amblyomma varium, commonly known in brazil as the "carrapato-gigante-da-pregui a" (sloth's giant tick) is found from southern central america to argentina. the present study adds information on the geographical distribution of a. varium, as well as on their hosts, based on material deposited in the main brazilian collections and on the available literature. eighty-two vials, containing 191 adult specimens, deposited in five acari collections between 1930 and 2001, were examined. these vials incl ... | 2003 | 12563481 |
| collection and evaluation of semen from the three-toed sloth (bradypus tridactylus). | sloths (bradypus sp.) are extremely sensitive animals that suffer with the destruction and fragmentation of forests. they present a low population growth rate and need to be further studied for the preservation of the specie. thus, the aim of this study was to establish an efficient semen collection protocol as well as characterize sperm concentration, motility and morphology in order to contribute with information about the reproductive traits of this specie, which has never been described in t ... | 2008 | 18417178 |
| ultrastuctural study on the relations among nerve elements and ependymal cells of the "bradypus tridactylus". | on hand of the electonmicroscope, the authors study 24 parts of the encephalic ventricles in samples of bradypus tridactylus, relating the nervous structures to the ependymal lining, chiefly emphasizing the presence of intraventricular unmyelinated fibres. in various of these regions, typical nerve fibres and other intraventricular cell projections, that cannot be taken as nerve structures, because of the continuity they show along with ependymal cells, were observed. finally they make an analys ... | 1981 | 181792 |
| morphology and innervation of the diaphragma of myrmecophaga tridactyla. | the diaphragma of 4 "myrmecophaga tridactyla" was described. the diaphragma follows the general pattern of edentata, but it has special features which make it possible to differentiate it from that of "bradypus tridactylus. | 2004 | 1805705 |
| morphology of the dentin structure of sloths bradypus tridactylus: a light and scanning electron microscopy investigation. | the aim of this study was to describe the dentine morphology of sloths (bradypus tridactylus). the sloth teeth were removed and prepared for light microscopy (lm) and scanning electron microscopy analyses (sem). lm revealed two patterns of tubular dentins: an outer with dentinary tubules over the all tooth length and one in the inner part with larger diameter and more spaced tubules, when compared to those present in the outer dentine. these findings were confirmed by sem, which revealed a tubul ... | 2013 | 23410180 |
| low rate of genomic repatterning in xenarthra inferred from chromosome painting data. | comparative cytogenetic studies on xenarthra, one of the most basal mammalian clades in the placentalia, are virtually absent, being restricted largely to descriptions of conventional karyotypes and diploid numbers. we present a molecular cytogenetic comparison of chromosomes from the two-toed (choloepus didactylus, 2n = 65) and three-toed sloth species (bradypus tridactylus, 2n = 52), an anteater (tamandua tetradactyla, 2n = 54) which, together with some data on the six-banded armadillo (euphra ... | 2005 | 16235115 |
| ultrastructural study of crystalloids in sertoli cells of the three-toed sloth (bradypus tridactylus). | crystalloids were found in sertoli cells of the testis of the three-toed sloth by examination at the light- and electron-microscopic levels. needle-, or spindle-shaped crystalloids, varying in length, were located in the basal part of the sertoli cells. they consisted of bundles of filaments each measuring approximately 11 nm in diameter. several filaments were packed hexagonally to form a bundle. the center-to-center distance between individual filaments of a bundle was approximately 17 nm. per ... | 1990 | 2317847 |
| some morphological and histochemical studies on the intestinal tract of the brazilian sloth (bradypus tridactylus). | the intestinal of the 3-toed sloth, bradypus tridactylus, was studied macroscopically, with light microscope and with histochemical methods for mucosubstances. macroscopically, the inner surface of the duodenum shows longitudinal and circular folds. there is no caecum, nor appendix. the large intestine consists of a short colon and a large rectal pouch, which has a thick wall. the mucosa of the small intestine has long leaf-shaped villi covered with columnar epithelium having a well developed st ... | 1989 | 2759417 |
| responses of the three-toed sloth, bradypus tridactylus, to some commonly used pharmacologic agents. ii. chloralose and reserpine. | 1. chloralose, 50 mg/kg i.v., is a safe effective anesthetic for sloths and reduces incidence of cardiac arrhythmias. 2. however, chloralose blocks baroreflexes and may reduce the sensitivity of beta 1 cardiac receptors. 3. reserpine, 0.70 mg/kg given i.v. in divided doses, blocks the hypertensive effect of 100 micrograms/kg of tyramine in sloths. 4. reserpine in this dosage materially reduces arterial pressure and heart rate; these effects last at least 7 days. 5. reserpine potentiates the hype ... | 1989 | 2565194 |
| responses of the three-toed sloth, bradypus tridactylus, to some commonly used pharmacologic agents. i. autonomic drugs. | 1. sloths are very responsive to epinephrine and norepinephrine; i.v. injection of 1 microgram/kg elevates systolic pressure 80 and 90% respectively. 2. doses as low as 0.01 microgram/kg of epinephrine as well as norepinephrine raise diastolic pressure. 3. similarity of effects of these catecholamines can be explained on the basis of the low proportion of skeletal muscle (35 vs 45% in most mammals) and a small liver which reduces the proportion of beta 2 dilators to alpha constrictors responding ... | 1987 | 2893682 |
| correlative scanning and transmission electron microscopic study on the ependymal surface of bradypus tridactylus. | topographical variations of the ependymal surface of the whole brain ventricular system of bradypus tridactylus were studied at the scanning electron microscope after co2 critical point drying and carbon-gold coating. certain selected areas were also studied at the transmission electron microscope, following standard technical procedures. we observed distinct patterns in the distribution of cilia, microvilli and supraependymal structures (nerve-like and fibrous astrocyte fibers), and also a smal ... | 1983 | 6870587 |
| sleep and waking in the three-toed sloth, bradypus tridactylus. | the sleep-waking cycles of the three-toed sloth, bradypus tridactylus, were studied by direct observation and polygraphic recording and the results were correlated. three states of waking behavior were recognized, "awake-exploring", "awake-alert" and "awake-fixating". eeg recordings were classified as two waking states., a1 which was seen during both "awake-exploring" and "awake-alert" behavior and a2 which had some of the characteristics of drowsy behavior of other mammals and often accompanied ... | 1983 | 6139209 |
| isolation and convulsivant effect of the "insulin-like" protein obtained from the exocrine pancreas of bradypus tridactylus l. | 1. a pancreatic insulin-like protein fraction with low electrophoretic mobility showing high molecular weight is present. 2. isoelectric focussing studies showed that the high molecular weight protein has a pi about 7.4 when used at a ph range between 3.5 and 8.0. 3. the partially purified aldehyde-fuchsin positive high molecular weight protein fraction gave a positive effect for the convulsivant test in mice. 4. a high molecular weight insulin-like protein in pancreatic juice was found. 5. insu ... | 1983 | 6132744 |
| the fine structure of the placental labyrinth in the sloth, bradypus tridactylus. | the placental labyrinth of the three-toed sloth (bradypus tridactylus) was examined by electron microscopy. the material available was from two fetuses of 55 mm and 150 mm crown-rump length (crl). the placenta of the younger specimen was a transition form between the syndesmochorial type and the endotheliochorial type. the interhemal membrane of the 55 mm crl specimen consisted of the following components: 1) hypertrophied maternal endothelial cells surrounding the maternal vessels; 2) a small a ... | 1982 | 7059018 |
| the effects of posture on blood pressure and heart rate in the three-toed sloth, bradypus tridactylus. | 1. in unanesthetized, minimally restrained three-toed sloths, bradypus tridactylus, the mean arterial pressure was 125/85 mmhg and the heart rate was 83.6 beats/min. there was no significant difference between these parameters whether the animal was erect or supine in the experimental chair. 2. animals without any restraint had a mean blood pressure of 133/87 mmhg and a heart rate of 78.1 beats/min. there was no significant difference between these parameters whether the animal was seated or sus ... | 1982 | 6130871 |
| ultrastructure of the pancreas of bradypus tridactylus. | the fine structure of the pancreas of the south american three toed sloth, bradypus tridactylus, is described. in exocrine cells two types of granules are found. the first variety of granules is circular, of about 0.9 micrometer mean diameter, and probably represents zymogen granules. the second type of granule is larger (up to 1.4 micrometer in diameter) and contains a granular electron-dense material which is separated from the limiting membrane by a wide space. only one type of islet cell was ... | 1981 | 7020322 |
| some histological and histochemical studies of the pancreas of the brasilian sloth, bradypus tridactylus. | the histological and histochemical study of the pancreas of the three-toed sloth, bradypus tridactylus, demonstrated that with the methods employed the pancreatic islets are apparently formed by a cells exclusively. two different types of argyrophilic cells were noticed in the exocrine secretory units when grimelius' method was used. the methods for the demonstration of d cells showed negative results. aldehyde fuchsin-positive granules were only noticed at the apex of the exocrine pancreatic ce ... | 1981 | 6167134 |
| dirofilaria macrodemos and d. panamensis spp. n. (nematoda: filarioidea) from central and south americal sloths. | two new species of diorfilaria, dirofilaria macrodemos and dirofilaria panamensis, are described from the subserosa of central and south american sloths. dirofilaria macrodemos, described from the three-toed sloth, bradypus tridactylus, in guyana, is characterized and differentiated from other dirofilarias by its length (female 214mm, male 64mm), relatively long tail (female 140 micron, male 110 micron), and the number and distribution of the caudal papillae (7 pairs) in the male. dirofilaria pa ... | 1978 | 641661 |
| ultrastructural study of the subependymal tissue in the "bradypus tridactylus". | | 1977 | 877320 |
| histological and ultrastructural study on the subcommissural organ of bradypus tridactylus. | the subcommissural organ (sco) of the bradypus tridactylus was studied from the histological and ultrastructural point of view. the methods of gomori (alum-chromic-hematoxylin-phloxine), azan (m. heidenhain), kluver and barrera (for nerve cells and myelinated fibers) and silver impregnation according to palmgren and cajal-de castro, were used. the material prepared for ultrastructural analize was submitted to the sequence of gluteraldehyde, osmium tetroxide, uranyl acetate and lead citrate. in f ... | 1977 | 561559 |
| ultrastructural study on topographical variations of the ependyma in bradypus tridactylus. | an electron-microscopic study of ependymal cells in 24 different areas of the encephalic ventricular system of bradypus tridactylus was made, with a view to making a comparative analysis, of a topographical kind, of various cell components: cilia, microvilli, plasma membrane, cytoplasmic protrusions, types of cellular junctions, ribosomes, golgi apparatus, endoplasmic reticulum, microfilaments, microtubules, mitochondria, granules and dense bodies. there were differences in the distribution of a ... | 1976 | 1032077 |
| sensory and motor representation in the cerebral cortex of the three-toed sloth (bradypus tridactylus). | cortical sensory receiving areas were studied in 32 specimens of the three-toed sloth, bradypus tridactylus, using the evoked response technique and barbiturate anaesthesia. somatotopic organization in the somesthetic first area (s-i) was shown to be similar to that reported in higher mammals. the area devoted to the representation of the forelimb was considerably larger than that for the remaining body parts. the second somatosensory area (s-ii), showing bilateral representation without a preci ... | 1975 | 1139302 |
| histological and histochemical study on the ependyma of bradypus tridactylus. | histological and histochemical aspects of the whole encephalic ventricular system of eight specimens of bradypus tridactylus were studied. after anesthesia and perfusion, the encephalons were obtained by craniotomy. transverse serial sections of the encephalon, stained according to azan (heidenhain's method) or kluver-barrera for nerve cells and myelinated nerve fibers; silver impregnation was carried out according to cajal-de castro's or palmgren's methods. the following histochemical reactions ... | 1975 | 1163204 |
| blood chemistry of the sloth (choloepus hoffmanni and bradypus tridactylus). | | 1972 | 4334432 |
| myocardial ultrastructure and electrocardiograms of the sloth (bradypus tridactylus) under normal and experimental conditions. | | 1968 | 5652106 |
| [morphological aspects and histochemical study of polysaccharides on the salivary lingual glands of mammalia. iv. xenarthra (dasypus novemcinctus and bradypus tridactylus)]. | | 2003 | 5244818 |
| the lymphatic system of bradypus tridactylus. | | 1965 | 5867110 |
| [research on the alpha and beta adrenoceptive receptors in the sloth (bradypus tridactylus)]. | | 1965 | 4158567 |
| [study of the beta adrenergic receptors in the sloth (bradypus tridactylus)]. | | 1963 | 14097315 |
| [adrenalin, noradrenalin, carotid sinus reflex in the sloth (bradypus tridactylus)]. | | 1960 | 13809522 |
| [studies on comparative hematology. iv. hematologic data on bradypus tridactylus l., 1758 (the sloth)]. | | 1954 | 13296862 |
| novel anaplasma and ehrlichia organisms infecting the wildlife of two regions of the brazilian amazon. | during 2009-2012, wild animals were sampled in the amazon biome of brazil. animal tissues and blood were tested by polymerase chain reaction (pcr) assays targeting dna of the bacterial family anaplasmataceae (genera anaplasma, ehrlichia, wolbachia) and the genus borrelia. overall, 181 wild animals comprising 36 different species (2 reptiles, 5 birds, and 29 mammals) were sampled. all birds and reptiles were negative by all pcr assays, as well as all mammals for the borrelia pcr assay. anaplasmat ... | 2017 | 28690147 |
| q fever epidemic in cayenne, french guiana, epidemiologically linked to three-toed sloth. | a q fever epidemic occurred in 2013 in a small military residential area in cayenne, french guiana. a retrospective cohort study was conducted to identify q fever risk factors. confirmed acute q fever case was defined as positive serology (igm ≥ 50 and phase ii igg ≥ 200) and/or positive qpcr on serum or blood. in addition, wild mammals were captured at the study site and tested by serology and real-time pcr performed on blood, vaginal swabs and ticks. the attack rate was 20 percent (11/54). all ... | 2018 | 29406281 |