| perceptual learning ability in mandrillus sphinx and cercopithecus nictitans. | | 1974 | 4216054 |
| [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-ind ... | 1982 | 6215102 |
| the primate community of the lopé reserve, gabon: diets, responses to fruit scarcity, and effects on biomass. | the diets of all diurnal primates (gorilla g. gorilla, pan t. troglodytes, mandrillus sphinx, colobus satanas, cercocebus albigena, cercopithecus nictitans, c. pogonias, c. cephus) in the lópe reserve, central gabon, are described from qualitative and quantitative data collected over 10 years. a total of 397 foods were recorded, of which 91% were from plants. the diet of seven of the eight species were numerically dominated by fruit, the exception being colobus satanas with a diet dominated by s ... | 1997 | 9108968 |
| mutations in ccr5-coding sequences are not associated with siv carrier status in african nonhuman primates. | african monkeys can be naturally infected with siv but do not progress to aids. since mutations in the human ccr5 gene have been shown to influence susceptibility to hiv infection and disease progression, we have now investigated whether mutations in ccr5-coding sequences in african nonhuman primates can explain species-specific differences in susceptibility to lentiviral infection. the animals studied comprise chronically infected monkeys corresponding to four natural hosts of siv (cercopithecu ... | 1999 | 10408730 |
| molecular and phylogenetic analyses of 16 novel simian t cell leukemia virus type 1 from africa: close relationship of stlv-1 from allenopithecus nigroviridis to htlv-1 subtype b strains. | a serological survey searching for antibodies reacting with human t-cell leukemia virus type 1 (htlv-1) antigens was performed on a series of 263 sera/plasma obtained from 34 monkey species or subspecies, originating from different parts of africa. among them, 34 samples exhibited a typical htlv-1 western blot pattern. polymerase chain reaction was performed with three primer sets specific either to htlv-1/stlv-1 or htlv-2 and encompassing gag, pol, and tax sequences, on genomic dna from periphe ... | 2001 | 11531406 |
| evidence for a second simian t-cell lymphotropic virus type 3 in cercopithecus nictitans from cameroon. | | 2001 | 11708284 |
| characterization of a novel simian immunodeficiency virus with a vpu gene from greater spot-nosed monkeys (cercopithecus nictitans) provides new insights into simian/human immunodeficiency virus phylogeny. | in the present study, we describe a new simian immunodeficiency virus (siv), designated sivgsn, naturally infecting greater spot-nosed monkeys (cercopithecus nictitans) in cameroon. together with sivsyk, sivgsn represents the second virus isolated from a monkey belonging to the cercopithecus mitis group of the cercopithecus genus. full-length genome sequence analysis of two sivgsn strains, sivgsn-99cm71 and sivgsn-99cm166, revealed that despite the close phylogenetic relationship of their hosts, ... | 2002 | 12134035 |
| distribution, population density, and status of sympatric cercopithecids in the campo-ma'an area, southwestern cameroon. | a study on species composition, distribution, and population density of cercopithecids in the campo-ma'an area, southwestern cameroon, was undertaken from december 1997 until august 2000. a total of 665.5 km of line transects was used for the census. thirteen diurnal primate species including five endangered species (gorilla g. gorilla, pan troglodytes, mandrillus sphinx, colobus satanas, cercocebus torquatus) were recorded in the campo forest, the greatest part of which is a logging concession. ... | 2002 | 12145397 |
| identification of trypanosomes in wild animals from southern cameroon using the polymerase chain reaction (pcr). | one possible explanation of the maintenance of many historical foci of sleeping sickness in central africa could be the existence of a wild animal reservoir. in this study, pcr was used to detect the different trypanosome species present in wild animal captured by hunters in the southern forest belt of cameroon (bipindi). trypanosomes were also detected by a parasitological method (quantitative buffy coat: qbc). parasite could not be isolated in culture medium (kit for in vitro isolation: kivi). ... | 2002 | 12514949 |
| characterization of a novel simian immunodeficiency virus (sivmonng1) genome sequence from a mona monkey (cercopithecus mona). | a novel simian immunodeficiency virus (siv) sequence has been recovered from rna extracted from the serum of a mona monkey (cercopithecus mona) wild born in nigeria. the sequence was obtained by using novel generic (degenerate) pcr primers and spans from two-thirds into the gag gene to the 3' poly(a) tail of the sivmonng1 rna genome. analysis of the open reading frames revealed that the sivmonng1 genome codes for a vpu protein, in addition to gag, pol, vif, vpr, tat, rev, env, and nef proteins. ... | 2003 | 12768007 |
| identification of a new simian immunodeficiency virus lineage with a vpu gene present among different cercopithecus monkeys (c. mona, c. cephus, and c. nictitans) from cameroon. | during a large serosurvey of wild-caught primates from cameroon, we found 2 mona monkeys (cercopithecus mona) out of 8 and 47 mustached monkeys (cercopithecus cephus) out of 302 with human immunodeficiency virus (hiv)-simian immunodeficiency virus (siv) cross-reactive antibodies. in this report, we describe the full-length genome sequences of two novel sivs, designated sivmon-99cmcml1 and sivmus-01cm1085, isolated from one mona (cml1) and one mustached (1085) monkey, respectively. interestingly, ... | 2003 | 14610175 |
| new simian immunodeficiency virus infecting de brazza's monkeys (cercopithecus neglectus): evidence for a cercopithecus monkey virus clade. | nearly complete sequences of simian immunodeficiency viruses (sivs) infecting 18 different nonhuman primate species in sub-saharan africa have now been reported; yet, our understanding of the origins, evolutionary history, and geographic distribution of these viruses still remains fragmentary. here, we report the molecular characterization of a lentivirus (sivdeb) naturally infecting de brazza's monkeys (cercopithecus neglectus). complete sivdeb genomes (9,158 and 9227 bp in length) were amplifi ... | 2004 | 15220449 |
| a new stlv-1 in a household pet cercopithecus nictitans from gabon. | a recent serological survey of wild-born captive monkeys from gabon, central africa, revealed that 1 of 20 cercopithecus nictitans tested was infected with a new simian t cell lymphotropic virus type 1 (stlv-1). we investigated the molecular relationship between the stlv-1 strain present in this c. nictitans (cn01) and the other available htlv/stlv strains. phylogenetic analysis of the env (gp46 and gp21) region showed that the new stlv(nict) clusters with the htlv-1/stlv-1 group and not with th ... | 2004 | 15242546 |
| characterization of a novel vpu-harboring simian immunodeficiency virus from a dent's mona monkey (cercopithecus mona denti). | we report the identification of a new simian immunodeficiency virus (siv), designated sivden, in a naturally infected dent's mona monkey (cercopithecus mona denti), which was kept as pet in kinshasa, capital of the democratic republic of congo. sivden is genetically distinct from the previously characterized primate lentiviruses. analysis of the full-length genomic sequence revealed the presence of a vpu open reading frame. this gene is also found in the virus lineage of human immunodeficiency v ... | 2005 | 15956597 |
| [clinical management of patients and deceased during the ebola outbreak from october to december 2003 in republic of congo]. | outbreaks of ebola virus hemorrhagic fever (evhf) have been reported since 2001 in the cuvette ouest department, a forested area located in the western north of congo. at the end of october 2003 a new alarm came from this department which was quickly confirmed as being an epidemic of evhf. the outbreak response was organized by the ministry of health with the assistance of an international team under the aegis of who. the case management of suspect cases was done in an isolation ward set up at t ... | 2005 | 16267964 |
| full-length sequence analysis of sivmus in wild populations of mustached monkeys (cercopithecus cephus) from cameroon provides evidence for two co-circulating sivmus lineages. | mustached monkeys (cercopithecus cephus), which form a significant component of primate bushmeat in west central africa, are infected with simian immunodeficiency virus (sivmus). we identified and genetically characterized five new sivmus strains infecting wild living mustached monkeys from cameroon. phylogenetic analysis of partial pol sequences revealed that sivmus strains form two distinct groups within the clade comprised of lentiviruses isolated from cercopithecus nictitans (sivgsn), cercop ... | 2007 | 17156809 |
| evolutionary and comparative anatomical investigations of the autonomic cardiac nervous system in the african cercopithecidae. | the purpose of this study was to clarify the general architecture and morphological variations of the autonomic cardiac nervous system (acns) in the african cercopithecidae (old world monkeys), and to discuss the evolutionary changes between this system in african/asian cercopithecidae and humans. a detailed macroscopic comparative morphological investigation of the acns was performed by examining the left and right sides of 11 african cercopithecid specimens, including some previously unreporte ... | 2007 | 17591730 |
| locomotion and habitat use of stampflii's putty-nosed monkey (cercopithecus nictitans stampflii) in the taï national park, ivory coast. | stampflii's putty-nosed monkeys cercopithecus nictitans stampflii are large, rare, poorly known guenons with a discontinuous distribution in west africa. putty-nosed monkeys occur at low densities in ivory coast's tai national park where they are believed to have migrated from less forested regions north of the park (eckardt and zuberbühler: behav ecol 15 (2004) 400-411). in this article, we compare the positional behavior of putty-nosed monkeys to that of three other guenon species in the tai f ... | 2007 | 17632798 |
| note on drill (mandrillus leucophaeus) ecology and conservation status in korup national park, southwest cameroon. | we report preliminary findings on drill population ecology, feeding ecology, primate associations and conservation status in korup national park, cameroon, based on analysis of data collected during 1,346 km (620 field hours) of trail patrols from february to june 2006. we encountered drills on 25 occasions and collected 304 fecal samples. group size was estimated on four occasions (> or =25, > or =40, > or =67, > or =77), and multiple males were heard emitting the characteristic two-phase grunt ... | 2008 | 17922527 |
| phylogenomics of african guenons. | the karyotypes of 28 specimens belonging to 26 species of cercopithecinae have been compared with each other and with human karyotype by chromosome banding and, for some of them, by zoo-fish (human painting probes) techniques. the study includes the first description of the karyotypes of four species and a synonym of cercopithecus nictitans. the chromosomal homologies obtained provide us with new data on a large number of rearrangements. this allows us to code chromosomal characters to draw cerc ... | 2008 | 18679816 |
| phylogenetic analysis reveals the presence of the trypanosoma cruzi clade in african terrestrial mammals. | despite the impact of some trypanosome species on human and livestock health, the full diversity of trypanosomes in africa is poorly understood. a recent study examined the prevalence of trypanosomes among a wide variety of wild vertebrates in cameroon using species-specific pcr tests, but six trypanosome isolates remained unidentified. here they have been re-examined using fluorescent fragment length barcoding (fflb) and phylogenetic analysis of glycosomal glyceraldehyde phosphate dehydrogenase ... | 2009 | 19027884 |
| extensive survey on the prevalence and genetic diversity of sivs in primate bushmeat provides insights into risks for potential new cross-species transmissions. | to evaluate the risk of cross-species transmissions of sivs from non-human primates to humans at the primate/hunter interface, a total of 2586 samples, derived from primate bushmeat representing 11 different primate species, were collected at 6 distinct remote forest sites in southeastern cameroon and in yaoundé, the capital city. siv prevalences were estimated with an updated siv lineage specific gp41 peptide elisa covering the major part of the siv diversity. siv positive samples were confirme ... | 2010 | 19393772 |
| influence of habitat and seasonal variation on wild mammal diversity and distribution with special reference to the trypanosoma brucei gambiense host-reservoir in bipindi (cameroon). | to evaluate the role of wildlife in the resurgence and perenisation of human african trypanosomiasis (hat), we investigated the influence of habitat and seasonal variations on the diversity and spatial distribution of wild mammals, with special reference to those recognised as potential host-reservoirs of trypanosoma brucei gambiense in bipindi (southwestern cameroon). to achieve this, we carried out transect surveys in four habitat types over two years. a total of 31 mammal species were recorde ... | 2009 | 19732737 |
| diversity and spatial distribution of vectors and hosts of t. brucei gambiense in forest zones of, southern cameroon: epidemiological implications. | host and vector distribution of trypanosoma brucei gambiense was studied in relation to habitat types and seasons. six (19.35%) of the 31 mammal species recorded in bipindi were reservoir hosts. cercopithecus nictitans was confined to the undisturbed forest and the low intensive shifting cultivation zones, while cephalophus monticola, cephalophus dorsalis, cricetomys gambianus, atherurus africanus and nandinia binotata occurred in all the habitat types. as for vectors of human african trypanosom ... | 2010 | 20067756 |
| status of diurnal primate populations at the former settlement of a displaced village in cameroon. | to understand whether or not primate populations recover in areas of abandoned human settlements, data are required that allow for site-specific comparison over time. here, we present baseline information on the presence/absence and relative abundance of primate species at the abandoned settlement of the ekundukundu village, relocated out of the korup national park in 2000. between july 2007 and march 2008, 62 km of transects was surveyed for sightings and calls of primates. all eight species of ... | 2010 | 20198684 |
| postdispersal removal and germination of seed dispersed by cercopithecus nictitans in a west african montane forest. | factors that determine the effectiveness of primates as seed dispersers include (i) the microsite into which they deposit seed, (ii) secondary removal of seed by other taxa and (iii) the effect of gut passage and/or spitting on subsequent seed germination. this contribution evaluated these factors in the little studied putty-nosed monkey, cercopithecus nictitans, in a nigerian montane forest. field experiments showed that c. nictitans has greatly increased in its importance as a disperser of med ... | 2010 | 20431293 |
| prevalence of gastrointestinal parasites in primate bushmeat and pets in cameroon. | to document the prevalence of gastrointestinal parasites in cameroonian monkeys and to assess the risk of transmission to humans, we sampled 125 primates belonging to 15 species, of which 78 had been captured for bushmeat in the wild, and 47 were pets kept in urban areas. seven nematode species, one trematode, one cestode and three protozoa were detected. eight different parasite species were found in cercopithecus nictitans and six in c. neglectus, c. pogonias and cercocebus agilis. helminths w ... | 2010 | 20970258 |
| invasive aspergillosis in a putty-nosed monkey (cercopithecus nictitans) with adrenocortical cushing's syndrome. | an 18-year-old captive female putty-nosed-monkey (cercopithecus nictitans) with a history of long-term infertility and hyperglucocorticism was euthanized because of perforating thoracic trauma induced by group members and subsequent development of neurological signs. | 2012 | 22429114 |
| origin of htlv-1 in hunters of nonhuman primates in central africa. | of 78 gabonese individuals who had received bites from nonhuman primates (nhps) while hunting, 7 were infected with human t lymphotropic virus (htlv-1). five had been bitten by gorillas and were infected with subtype b strains; however, a 12-year-old girl who was severely bitten by a cercopithecus nictitans was infected with a subtype d strain that was closely related to the simian t lymphotropic virus (stlv-1) that infects this monkey species. her mother was infected with a subtype b strain. th ... | 2015 | 25147276 |
| ubiquitous hepatocystis infections, but no evidence of plasmodium falciparum-like malaria parasites in wild greater spot-nosed monkeys (cercopithecus nictitans). | western gorillas (gorilla gorilla) have been identified as the natural reservoir of the parasites that were the immediate precursor of plasmodium falciparum infecting humans. recently, a p. falciparum-like sequence was reported in a sample from a captive greater spot-nosed monkey (cercopithecus nictitans), and was taken to indicate that this species may also be a natural reservoir for p. falciparum-related parasites. to test this hypothesis we screened blood samples from 292 wild c. nictitans mo ... | 2012 | 22691606 |
| identifying preferred habitats of samango monkeys (cercopithecus (nictitans) mitis, erythrarchus) through patch use. | to examine habitat preferences of two groups of samango monkeys (cercopithecus (nictitans) mitis erythrarchus) in the soutpansberg, south africa, we used experimental food patches in fragments of tall forest and in bordering secondary growth short forest. additionally, to test for the impacts of group cohesion and movement on habitat use, we tested for the interaction of space and time in our analyses of foraging intensity in the experimental food patches placed throughout the home ranges of the ... | 2013 | 24513301 |
| new insights into samango monkey speciation in south africa. | the samango monkey is south africa's only exclusively forest dwelling primate and represents the southernmost extent of the range of arboreal guenons in africa. the main threats to south africa's forests and thus to the samango are linked to increasing land-use pressure and increasing demands for forest resources, resulting in deforestation, degradation and further fragmentation of irreplaceable habitats. the species belongs to the highly polytypic cercopithecus nictitans group which is sometime ... | 2015 | 25798604 |
| identifying preferred habitats of samango monkeys (cercopithecus (nictitans) mitis erythrarchus) through patch use. | to examine habitat preferences of two groups of samango monkeys (cercopithecus (nictitans) mitis erythrarchus) in the soutpansberg, south africa, we used experimental food patches in fragments of tall forest and in bordering secondary growth short forest. additionally, to test for the impacts of group cohesion and movement on habitat use, we tested for the interaction of space and time in our analyses of foraging intensity in the experimental food patches placed throughout the home ranges of the ... | 2013 | 24432361 |
| oncocytic adrenocortical carcinoma in a putty-nosed monkey (cercopithecus nictitans) with hyperadrenocorticism. | oncocytic adrenocortical tumours are rare in man and have never been described in non-human primates. an oncocytic adrenocortical carcinoma was identified in an 18-year-old female putty-nosed monkey (cercopithecus nictitans) with hyperadrenocorticism and invasive aspergillosis. microscopically, the tumour consisted of large cells with abundant eosinophilic, granular cytoplasm containing numerous mitochondria as identified by electron microscopy. tumour cells had large nuclei with occasional intr ... | 2013 | 23746483 |
| genetic characterization of simian foamy viruses infecting humans. | simian foamy viruses (sfvs) are retroviruses that are widespread among nonhuman primates (nhps). sfvs actively replicate in their oral cavity and can be transmitted to humans after nhp bites, giving rise to a persistent infection even decades after primary infection. very few data on the genetic structure of such sfvs found in humans are available. in the framework of ongoing studies searching for sfv-infected humans in south cameroon rainforest villages, we studied 38 sfv-infected hunters whose ... | 2012 | 23015714 |
| reductions in primate abundance and diversity in a multiuse protected area: synergistic impacts of hunting and logging in a congo basin forest. | this article explores spatial and temporal changes in diurnal primate abundance and behavior in response to hunting, logging, and conservation at the dzanga sangha dense forest reserve (rds), central african republic over time. we use a combination of line-transect surveys in 2002 and 2009 (n = 540 km) and ethnographic interviews (n = 210) to investigate changes in the status of cercopithecines and colobines at rds, with additional comparisons to earlier work. this protected area was lightly log ... | 2012 | 22644576 |
| fragmented living: behavioural ecology of primates in a forest fragment in the lopé reserve, gabon. | a 17-month study was made of the primates using a 9-ha "island" of forest, surrounded by savanna, in the northern part of the lopé reserve, gabon. one group ofcercopithecus cephus (plus a young malecercopithecus nictitans who was in permanent association with them) were resident in the fragment and groups of five other species of primates made visits during 127 days of observation:pan troglodytes, 15 visits;cercocebus albigena, 10;colobus satanas, 3;cercopithecus nictitans, 2;c. pogonias, 1. vis ... | 1999 | 23179544 |