SEARCH · PubMed Health

Results for “Cercopithecus”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 127 records · Page 7Linked to original sources

PubMed1985

Captive propagation of vervet monkeys (Cercopithecus aethiops) in harems.

A small breeding colony of captive vervet monkeys (Cercopithecus aethiops), consisting of ten single male harem groups, was established in Kenya. Vervets were extremely prone to stress after capture and manipulative procedures led to high mortalities. Six weeks were required for partial habituation, after which routine handling was not too problematic. However, complete adjustment to captivity took a minimum of one year. Establishment of stable breeding groups from adult animals initially proved difficult because of fighting among females. Once harem groups stabilized, reproductive rate was high with just under 90% pregnancies and 85% livebirths annually. Births exhibited a seasonal pattern similar to that reported from wild populations in Kenya.

Animals↗

PubMed1985

[Intracellular distribution of estradiol and estrogen binding sites in the uterus and oviducts of the green monkey (Cercopithecus griseus)].

Plasma estradiol (E2) and progesterone (P) concentrations, E2 and estrogen binding sites (EBS) content in the uterus and oviducts of green monkey (Cercopithecus griseus) were measured during different phases of the menstrual cycle. Plasma E2 and P patterns were practically identical to those of African-Asian monkeys and humans. The E2 and EBS levels in various subcellular fractions were also determined. The correlations between these parameters were shown to be in accordance with the active mass law for monomolecular interaction at equilibrium state and might vary at different phases of the cycle. The alteration is probably attributable to variations in the activity of estrogen-receptor interaction during the menstrual cycle.

Animals↗

PubMed1977

[Steroid metabolism in primates. XIX. Urinary excretion of C21-steroids in Cercopithecus aethiops and Erythrocebus patas].

In male Cercopithecus aethiops (green monkey; grivet) and Erythrocebus patas (dancing red monkey; patas monkey), the pattern of urinary C21 steroids was estimated and compared with those of man, baboon and rhesus monkey. The results indicate diminished 11 beta- and 17 alpha-hydroxylation in steroid biosynthesis as well as diminished delta 4-3-keto reduction and increased 20 beta-reduction in metabolism in these two species.

Animals↗

PubMed1978

Bacterial endocarditis with obstruction of the right atrioventricular orifice and the pulmonary outflow trace in an African monkey (Cercopithecus aethiops).

A 7 to 8-year-old male African green monkey (Cercopithecus aethiops) was found moribund in his cage. Fluid and antibiotic therapy were administered, but the monkey dies 2 hours later. At necropsy, large septic mural thrombi obstructed the right atrioventricular orifice and the pulmonary outflow tract, and smaller septic thrombi were attached to the leaflets of the pulmonary and mitral valves. Staphylococci were isolated from the large thrombus occluding the atrioventricular orifice. Large abscesses were present in the upper and lower lobes of the right lung, and small, wedge shaped infarcts were present in the lungs and kidneys. The clinical and pathologic findings were consistent with a rapidly progressive form of bacterial endocarditis. This was the only case of vegetative bacterial endocarditis seen at this instituion in 700 necropsies of nonhuman primates.

Animals↗

PubMed1982

[Cell kinetics and chromosome radiosensitivity of lymphocytes from 4 Cercopithecus species].

The harlequin-staining technique has been used to study the cell kinetics and the radiosensitivity of PHA-stimulated lymphocytes from Cercopithecus nictitans. C. aethiops var. cynosorus, C. irus, and C. ascanius. At 48 hours, the fixation time normally used for human lymphocytes, a large heterogeneity appears between the four species, with respect to the incidence of cells in first, second or third mitoses. If analysis of lymphocytes is restricted to Ml dividing cells, the yield of radiation-induced chromosome aberrations does not differ significantly from the incidence observed in irradiated human lymphocytes.

Animals↗

PubMedDate not supplied

[Experiment in infecting the green monkey Cercopithecus aethiops with a leukocyte virus isolated in hepatitis A].

The virus isolated in hepatitis A had been previously shown to passage in primary phytohemagglutinin-stimulated leukocyte cultures. The virus designated as leukocyte hepatitis virus (LHV) causes chromosome aberrations in the infected cultures. Some physico-chemical properties of LHV and its capacity for reproduction in other cell systems were studied. In serological surveys of patients and in studies of cellular immunity reactions of them LHV was found in cases of hepatitis. The possibility of producing a laboratory model of hepatitis in green monkeys, morphological reaction to inoculation with LHV, as well as the presence of specific antigen in the inoculated animals by immunofluorescence test using rabbit immune serum to LHV and FITC-labelled gamma globulins from hepatitis A convalescents were investigated. LHV antigen was found in the lymph nodes, spleen and liver. Active morphological reaction of lymph nodes and spleen was observed 30 days after inoculation of monkeys. The results indicate that in green monkeys LHV possesses marked reticulotropic properties without producing clinical hepatitis, therefore African grivet monkeys (Cercopithecus aethiops), apparently, cannot be used as experimental models for LHV studies in vivo.

Animals↗

PubMed1984

A spontaneous bronchogenic carcinoma in a Sykes monkey (Cercopithecus mitis stuhlmani).

A male blue monkey (Cercopithecus mitis stuhlmani), a subspecies of the Sykes group, was purchased from a commercial trapper as an adult in July 1978 and kept at the Institute of Primate Research, Kenya, for 2 years. The animal developed acute respiratory distress and died. Small nodular foci were found in the lung at necropsy and diagnosed as bronchogenic carcinoma on histopathology.

Animals↗

PubMed1983

Knotted umbilical cord as a cause of death in a Cercopithecus aethiops fetus.

A knotted umbilical cord was found in a third trimester Cercopithecus aethiops abortus. On the maternal side of the knot, the umbilical cord was engorged with blood. The umbilical cord on the fetal side of the knot was devoid of blood, suggesting that the knot may have occluded blood flow to the fetus.

Abortion, Veterinary↗

PubMed1984

Simian varicella infection in the African green monkey (Cercopithecus aethiops).

A severe and highly fatal disease occurred in African green monkeys (Cercopithecus aethiops). The disease was marked by an extensive maculo-vesicular rash. In fatal cases, multifocal necrosis and hemorrhage were found characteristically in many organs and tissues. New cases of the disease occurred over a 39-day period. Nine of 49 exposed African green monkeys were affected and five of the nine died. Four cynomolgus (Macaca fascicularis) and 31 stumptailed monkeys (Macaca arctoides) which were exposed were not affected. Delta Herposvirus was isolated from affected African green monkeys. Stumptailed monkeys housed in association with the African green monkeys, as well as those housed elsewhere, had significant serum concentrations of neutralizing antibodies to this agent.

Animals↗

PubMed1977

[Identification of monkey chromosomes by differential staining with Romanovsky--Giemza stain. III. Cercopithecus aethiops].

The distribution of the G-bands in chromosomes of bone marrow cells of Cercopithecus aethiops was studied by means of differentail staining with the Romanovsky - Gimsa dye. All the homologous chromosome pairs were identified and morphometric parameters were detected. The comparison of C. aethiops karyotypes with those of Macacca mulatta has shown that they are different in numbers and in the character of banding pattern of the most chromosomes. Both species revealed 12 pairs of chromosomes similar in their morphology and parameters.

Animals↗

PubMed1981

Attempted transmission of canine ehrlichiosis to the vervet monkey (Cercopithecus pygerythrus).

Blood from a domestic dog infected with Ehrlichia canis was injected into 3 adult vervet monkeys Cercopithecus pygerythrus. The monkeys did not develop any clinical or haematological signs of disease, nor did they seem to be able to harbour the parasite. Furthermore, neither morulae of E. canis nor haematological evidence of ehrlichiosis were seen after these monkeys had been splenectomized. The splenectomized monkeys did, however, develop a severe parasitaemia of their red cells with Entopolypoides macaci. They also showed a transient haematuria, mild inappetence and listlessness.

Animals↗

PubMed1981

Cultivation of second and third passage cells from Cercopithecus monkey kidneys in monolayer cultures.

In order to further reduce the amount of monkeys used for production of inactivated poliovaccine without expensive investments, cultivation of second and third passage cells from Cercopithecus monkey kidneys in monolayer cultures has been attempted. Steep growth curves were obtained for all three passages. But the initial loss of cells in the first passage was a problem. Another one was the increased risk of contamination when higher passages of monolayer cultures were used. For practical purposes it may therefore be more favourable to use second instead of third passage cells.

Animals↗

PubMed1980

[Analysis of the biological effect of city smog extract. VI. Comparative investigations on the effect of city smog extracts and their fractions on DNA synthesis of hamster kidney and embryonic cells and kidney cells of the primate Cercopithecus aethiops (author's transl)].

We analyzed the effect of two samples of city smog extracts and their fractions from Duisburg on the rate of DNA synthesis of mammalian cell cultures. - We employed tissue cultures of kidney and embryonic cells from the Syrian golden hamster (Cricetus aureatus) and kidney cells from the African green monkey (Cercopithecus aethiops). The DNA synthesis was determined autoradiographically after incubation with 3H-thymidine. We found that both city smog extracts exerted a dose-dependent suppression of cellular DNA synthesis. Monkey kidney cells were more sensitive than rodent cells. Analysis of single fractions indicate that the inhibition of DNA synthesis is the result of combined effects of all fractions. At present time it is not possible to correlate the toxic effect of the complete extract special to a single fraction or compound group.

Air Pollutants↗

PubMed1976

The diencephalon of the vervet monkey (Cercopithecus aethiops). Part I: thalamus and metathalamus.

The diencephalon of the vervet monkey (Cercopithecus aethiops) is described and compared with that of other primates, particularly the macaque monkey (Macaca mulatta). In the vervet monkey, the thalamus is divided into six nuclear groups: anterior, midline, medial, dorsolateral, ventrolateral and posterior. The anterior nuclear group shows a regressive nucleus anterodorsalis and a poorly defined demarcation between the nuclei anteromedialis and anteroventralis. There is a large interthalamic adhesion in which the ventral region containing nuclei centralis medialis, interventralis and reuniens, shows more regression than the dorsal region consisting of nuclei parataenialis and paraventralis. As the nucleus medialis ventralis is not present, the nucleus medialis dorsalis is described as the nucleus medialis; this is clearly differentiated into three parts, each part showing different cytological and architectonic features. The nucleus centrum medianum is larger and better developed than that of lower primates but is not entirely demarcated from the nucleus parafascicularis. The pulvinar is an enormous outgrowth from the dorsolateral thalamic nuclei. The ventrolateral thalamic nuclei are well differentiated from one another: a distinct nucleus ventralis dorsomedialis is present and appears to possess definite topographical and cytological differences from those of the other ventrolateral nuclei. The nucleus ventralis posteromedialis is further differentiated into a magno- and a parvocellular part. The nucleus ventralis posteroinferioris is a distinct entity. The lateral geniculate body shows a definite differentiation into two nuclei: pregeniculate and lateral geniculate nuclei. The lateral geniculate nucleus is a six-layered structure which is of the inverted type; it has undergone a lateral rotation through an anteroposterior axis from a dorsal position in the prosimian thalamus to its present ventral position in the higher primate thalamus. The medial geniculate body is not laminated as is the lateral geniculate nucleus; it consists of a small dorsomedial magnocellular and a large ventrolateral parvocellular part.

Animals↗

PubMed1976

The diencephalon of the vervet monkey (Cercopithecus aethiops). Part II: epithalamus, subthalamus and hypothalamus.

The nuclear configuration and topography of the epithalamus, subthalamus and hypothalamus of the vervet monkey (Cercopithecus aethiops) are described and compared with those of other primates, particularly the macaque monkey. The epithalamus does not show any striking structural differences, except some architectonic differentiation in the lateral habenular nucleus. The subthalamus is a phylogenetically stable structure throughout the primate scale; it does not show any significant changes, except that it extends less rostrally and that the nuclei entopeduncularis and peripeduncularis are much smaller and less well defined in the vervet monkey than those in the diencephalon of lower primates. The nucleus subthalamicus and the fields of Forel, though small in size, are comparatively well developed; the zona incerta appears to be differentiated cytoarchitectonically into two parts. The hypothalamus is divided morphologically into four regions--the preoptic, supraoptic, infundibular and mamillary regions. Although the hypothalamus of the vervet monkey is topographically identifiable with those of other primates, there are cyto- and myeloarchitectonic differences to be found in certain hypothalamic nuclei and areas. The preoptic region is small and poorly delimited from the parolfactory region antierorly and the supraoptic region posteriorly. The nucleus paraventricularis is large and well differentiated into secretory and non-secretory portions; the nucleus supraopticus does not show cellular separation into dorsolateral and ventromedial parts as clearly as they are in other primates. The nucleus dorsomedialis is not as well defined as the nucleus ventromedialis like it is in other primates. The nucleus tuberalis lateralis is comparably small, and is not split into several cellular groups as it is in higher primates. The posterior hypothalamic area is morphologically the best definable of the hypothalamic areas. The mamillary region is developmentally advanced, and very well differentiated into medial, lateral and intercalated nuclei.

Animals↗

PubMed1997

Growth, development, and sexual dimorphism in vervet monkeys (Cercopithecus aethiops) at four sites in Kenya.

Body weight and ten body segment measurements were collected from 367 wild-trapped vervet monkeys (Cercopithecus aethiops) in central and southern Kenya. The animals represent between 70 and 95% of the animals in each of 30 troops at four geographical locations separated by 80 to 380 km. The capture sites differed in altitude, mean annual rainfall and temperature. Two questions are addressed: (1) what are the differences in male and female growth patterns, and (2) what is the relationship between size, climate, and availability of food? Each animal was assigned to an age class based on dental examination. Means for all variables do not diverge for males and females from birth to age class 4 (15-18 months). After this, male and female growth rates diverge. This sexual dimorphism in growth pattern may reflect timing of entry into the reproductive community. A nested analysis of variance (ANOVA) was employed to compare sites, groups within sites and individuals within groups. Statistically significant differences between sites in body weight and body segment measurements are found for adult females. Except for tail length, these differences do not follow Bergmann's or Allen's Rules correlating size differences and temperature, but rather may reflect proximity to cultivated areas or tourist lodges with greater access to human food.

Age Determination by Teeth↗

PubMed1998

Locomotor activity differences between sympatric patas monkeys (Erythrocebus patas) and vervet monkeys (Cercopithecus aethiops): implications for the evolution of long hindlimb length in Homo.

Homo erectus is notable for its taller stature and longer lower limbs relative to earlier hominids, but the selective pressures favoring such long limbs are unclear. Among anthropoid primates, patas monkeys (Erythrocebus patas) and extant hominids share several extreme characteristics involved with foraging and movement, including the relatively longest lower limb proportions, longest daily travel distances and largest home ranges for their body or group size, occupancy of some of the driest habitats, and very efficient thermoregulatory systems. We suggest that patas monkeys are an appropriate behavioral model with which to speculate on the selective pressures that might have operated on H. erectus to increase lower limb length. Here, in a comparison of the locomotor activities of patas monkeys and sympatric, closely related vervet monkeys (Cercopithecus aethiops), we provide evidence for the hypothesis that patas use their long stride more to increase foraging efficiency while walking than to run, either from predators or otherwise.

Animals↗

PubMed1997

Size and distribution of retinal ganglion cells in the St. Kitts green monkey (Cercopithecus aethiops sabeus).

The topographical distribution of density and the soma size of retinal ganglion cells (RGCs) were studied in the St. Kitts green monkey (Cercopithecus aethiops sabeus). The total number of RGCs, estimated from light microscopic analysis of wholemounted and of transversely sectioned retinae, ranged between 1,183,721 and 1,273,715 (mean 1,228,646). These estimates are comparable to the number of optic nerve fibres (1,220,000) estimated from semithin sections. The topographic distribution of RGCs shows a strong centroperipheral gradient. The soma size distribution of RGCs in Nissl-stained flatmounts falls within a range of between 5.7 microm and 22.9 microm and is comparable to other primate species. Somata of RGCs were found to be generally smaller within the fovea than in peripheral regions. Ganglion cells, as reported for other diurnal primates, are nonuniformly distributed with a slight nasotemporal elongation of isodensity contours, and they exhibit nasotemporal asymmetry in the frequency distribution of soma size. The topography of the RGC distribution of this semiarboreal, ground-dwelling monkey is similar to what has been found in other diurnal Old World species.

Animals↗