| clinical responses of silvered leaf monkeys to infection with selected strains of rickettsia tsutsugamushi. | minimal clinical and hematologic signs were observed in silvered leaf monkeys inoculated intradermally with four strains of rickettsia tsutsugamushi, both virulent and avirulent for laboratory mice. the clinical response of the monkeys to the infection was related to neither the virulence of the strains in mice nor the antigenic characteristics of the strains. | 1979 | 119001 |
| comparison of experimental rickettsia tsutsugamushi infections in silvered leaf (presbytis cristatus) and cynomolgus (macaca fascicularis) monkeys. | both silvered leaf and cynomolgus monkeys were infected with the gilliam, karp and kato strains of rickettsia tsutsugamushi. the two species developed similar clinical syndromes, but the antibody responses were greater in cynomolgus monkeys. in both species of monkeys, the gilliam strain induced more severe clinical manifestations. at 10 months post-infection, silvered leaf monkeys were immune to homologous intradermal (id) challenge. cynomolgus monkeys, at 15 months post-infection, were relativ ... | 1979 | 120902 |
| patterns of rickettsemia and antibody response in silvered leaf monkeys (presbytis cristatus) after inoculation with virulent and avirulent strains of rickettsia tsutsugamushi. | most silvered leaf monkeys inoculated with selected strains of rickettsia tsutsugamushi developed rickettsemia. the time of onset and the duration of rickettsemia were related to the infecting strains, but these parameters could not be correlated with the virulence of the strain. the rickettsemia was not terminated by the appearance of humoral antibody, as detected by the indirect fluorescent antibody test. the specificities of the antibody responses were related to the antigens present in the i ... | 1977 | 404364 |
| clinical response of silvered leaf monkeys (presbytis cristatus) to infection with strains of rickettsia tsutsugamushi virulent and avirulent for mice. | silvered leaf monkeys (presbytis cristatus) inoculated with avirulent strains of rickettsia tsutsugamushi showed little or no signs of disease, whereas those inoculated with moderately or fully virulent strains developed severe disease. infection with the virulent strains produced early leukocytosis followed by leukopenia and significant decreases in packed-cell volumes. in animals infected with avirulent strains, these parameters were normal throughout the experimental period. | 1976 | 823272 |
| biochemical studies in presbytis cristata infected with subperiodic brugia malayi. | the presbytis cristata--brugia malayi model, now established as a reliable non-human primate model for the experimental screening of potential filaricides, was monitored at monthly intervals for changes in the liver and renal function tests and also for alkaline phosphatase levels during infection. animals infected with 200-400 infective larvae became patient at 50-90 days post-infection and geometric mean microfilarial counts were above 1000 per ml from the fourth month onwards. there were no s ... | 1991 | 1675809 |
| hematological changes in subperiodic brugia malayi infection of the leaf-monkey, presbytis cristata. | hematological changes were monitored in the leaf-monkey, presbytis cristata, infected experimentally with 200 subperiodic brugia malayi infective larvae. prepatent periods were 54-86 days and peak microfilarial geometric mean counts (gmcs) were 1324 per ml blood. total leukocyte and differential counts were measured at pre-infection, and then at weakly intervals before and during patency. blood eosinophil level increased to about thrice the initial level at 3 weeks post-infection and this was ma ... | 1991 | 1948274 |
| experimental infection of the leaf-monkeys, presbytis cristata and presbytis melalophos with subperiodic brugia malayi. | the leaf-monkeys, presbytis cristata and presbytis melalophos, experimentally infected with subperiodic brugia malayi, have been used for studies on the pathoimmunology of the infection and the screening of potential filaricides during the last 6-8 years, and considerable information on the pattern of microfilaraemia and adult worm recoveries have been obtained. the prepatent periods in 97 p. cristata and 45 p. melalophos, each infected with about 200 infective larvae, were similar, these being ... | 1990 | 1973024 |
| use of indonesian non-human primate erythrocytes for measles hemagglutination inhibition serology. | the use of erythrocytes (rbc) from presbytis cristata, p. melalophus and macaca fascicularis for measles hemagglutination inhibition serologies is presented. these primates can provide a ready supply of rbc for diagnostic reagent use in areas of the world where the african green monkey or rhesus macaque are not available. individuals of each species are useful but must be screened for hemagglutination ability of their erythrocytes. the animal can then be chosen that has erythrocytes which best a ... | 1987 | 3116677 |
| the silvered leaf monkey (presbytis cristata) as a model for human bancroftian filariasis. | | 1987 | 3312807 |
| chemoprophylactic studies with ivermectin against subperiodic brugia malayi infection in the leaf monkey, presbytis cristata. | four presbytis cristata were treated with oral ivermectin at the same time as the subcutaneous inoculation of 100 infective larvae monthly for three months. two animals given 0.2 mg/kg monthly and two others given 0.3 mg/kg monthly as well as three control animals became patent for microfilaraemia. however, only 1% of the infective dose was recovered as adult worms from animals in the higher drug dosage group compared to 8.2% and 6.2% in the lower dosage and control groups respectively. | 1987 | 3437112 |
| motor activity of different-aged cercopithecidae: silvered-leaf monkey (presbytis cristatus esch.), lion-tailed monkey (macaca silenus l.), moor macaque (macaca maura cuv.) as observed in the zoological garden, berlin (west). | the activity of different-aged monkeys belonging to three species of cercopithecidae was quantitatively analyzed in a 1 1/2-year study. the species, silvered-leaf monkey (presbytis cristatus esch.), lion-tailed monkey (macaca silenus l.) and moor macaque (macaca maura cuv.) were observed in the zoological garden, berlin (west). the data of a combined cross-sectional analysis across all three species indicate that the course of age-related changes in the frequency of movement can be depicted as g ... | 1986 | 3721206 |
| evidence of possible natural infections of man with brugia pahangi in south kalimantan (borneo), indonesia. | blood from 9 humans, 6 domestic cats (felis domesticus), and 5 silvered leaf monkeys (presbytis cristatus) from south kalimantan (borneo), indonesia, with known filarial infections was examined for determination ofacid phosphatase activity of the microfilarae (mff). the findings suggest 1) that brugia parasites from domestic cats and silvered leaf monkeys can be speciated by acid phosphatase activity and that speciation by acid phosphatase assay corresponds to that based upon adult worm morpholo ... | 1985 | 4071646 |
| the silvered leaf-monkey of malaysia, presbytis cristatus: disease model for human scrub typhus. | | 1973 | 4198721 |
| the silvered leaf monkey as a natural host of the lung mite, pneumonyssus simicola banks, (acarina: halarachnidae) in malaysia: a preliminary report. | | 1974 | 4215150 |
| the suitability of silvered leaf monkey (presbytis cristatus) kidney cell cultures for testing poliovirus vaccines. | | 1965 | 4287195 |
| gastric amebiasis in a silvered leaf monkey. | | 1984 | 6096330 |
| trapping, care, and laboratory management of the silvered leaf monkey (presbytis cristatus). | the silvered leaf monkey (presbytis cristatus) from south kalimantan ( borneo ), indonesia is a natural host for a variety of filarial nematodes including brugia malayi and wuchereria kalimantani . experimental studies show that it is host for w. bancrofti, a filarial nematode causing elephantiasis in man. presbytis cristatus is a gregarious primate of primary and secondary forests, roaming in troops of 20-30 members. primarily a fruit and leaf eater under natural conditions, this monkey can ada ... | 1984 | 6727293 |
| experimental infection of wuchereria bancrofti in the silvered leaf monkey presbytis cristatus eschscholtz, 1821. | | 1982 | 6757320 |
| parasites of the silvered leaf monkey, presbytis cristatus eschscholtz 1921, with a note on a wuchereria-like nematode. | | 1980 | 6767831 |
| clinical and immunologic responses of silvered leaf monkeys (presbytis cristatus) to experimental reinfection with rickettsia tsutsugamushi. | silvered leaf monkeys (presbytis cristatus) that had recovered from active rickettsia tsutsugamushi infections 14 months previously became rickettsemic when inoculated with homologous, related, or unrelated strains of r. tsutsugamushi. in contrast to the results after the initial infection that produced disease, no signs were observed after the subsequent infections. most animals responded with detectable titers of antibody to the karp antigen regardless of the inoculated strains. strains recove ... | 1981 | 6787140 |
| blood parasites of wild and domestic animals from south kalimantan (borneo), indonesia. | wild and domestic animals trapped from forests, villages, and rice fields in south kalimantan (3 degrees 20' s, 115 degrees 02' e, 25 m) were examined for blood parasites using giemsa stained thick and thin blood films and nuclepore filter preparations of peripheral vein and heart puncture blood. presbytis cristatus (silvered leaf monkey) (25%) and felis catus (domestic cat) (7%) were infected with brugia malayi and b. pahangi. in addition, p. cristatus was infected with wuchereria kalimantani ( ... | 1981 | 6789456 |
| scrub typhus antibody in cynomolgus monkeys (macaca fascicularis) in malaysia. | using an indirect immunofluorescence technique, sera from 113 cynomolgus monkeys (macaca fascicularis), trapped in peninsular malaysia, were screened for the presence of antibody to six prototype strains of rickettsia tsutsugamushi combined into three polyvalent groupings: i--karp, ta716, and ta763; ii--gilliam; and iii--ta678 and th1817. fifteen percent (17/113) of the monkeys had antibody titers greater than or equal to 1:50 to one or more of the antigenic groups. although a titer greater than ... | 1981 | 6790836 |
| filarid parasites of south kalimantan (borneo) indonesia. wuchereria kalimantani sp. n. (nematoda: filarioidea) from the silvered leaf monkey, presbytis cristatus eschscholtz 1921. | on the basis of morphological characteristics of adult and microfilarial stages, wuchereria kalimantani sp. n. (nematoda: filarioidea) is described. the parasites were recovered from the inguinal lymph nodes and testes of silvered leaf monkeys (presbytis cristatus) from a rubber estate, banjar regency, south kalimantan (borneo), indonesia. adult males are characterized by having more than 24 caudal papillae, a left spicule with a simple lamina, four pairs of sessile caudal papillae, a blunt tail ... | 1980 | 7420246 |
| an epizootic of measles in captive silvered leaf-monkeys (presbytis cristatus) in malaysia. | an epizootic of measles occurred in a group of 31 silvered leaf-monkeys (presbytis cristatus) that had been in captivity for 4-12 months. twenty-four of the monkeys exhibited a maculopapular rash that persisted for 6-9 days. a serous to mucopurulent nasal discharge and conjunctivitis were seen in some animals. eight monkeys died during the epizootic; however, their deaths could not be directly attributed to measles. serum samples from the surviving monkeys collected 1-2 months prior to, and 5 we ... | 1980 | 7421117 |
| complex fish probes for the subtelomeric regions of all human chromosomes: comparative hybridization of ceph yacs to chromosomes of the old world monkey presbytis cristata and great apes. | we have generated a human subtelomere probe panel, utilizing well characterized ceph yacs, for the investigation of human chromosome pathology and evolution through fluorescent in situ hybridization (fish). region-specific fish probes will be extremely valuable for detecting cytogenetically cryptic telomere abnormalities. here, we present the first comparative mapping study (with 29 subtelomere probes and 6 chromosome paints) to the old world monkey presbytis cristata, followed by hybridizations ... | 1997 | 9345897 |
| plasticity of human chromosome 3 during primate evolution. | comparative mapping of more than 100 region-specific clones from human chromosome 3 in bornean and sumatran orangutans, siamang gibbon, and old and new world monkeys allowed us to reconstruct ancestral simian and hominoid chromosomes. a single paracentric inversion derives chromosome 1 of the old world monkey presbytis cristata from the simian ancestor. in the new world monkey callithrix geoffroyi and siamang, the ancestor diverged on multiple chromosomes, through utilizing different breakpoints ... | 2004 | 14706448 |
| comparative cytogenetics of human chromosome 3q21.3 reveals a hot spot for ectopic recombination in hominoid evolution. | fluorescence in situ hybridization mapping of fully integrated human bac clones to primate chromosomes, combined with precise breakpoint localization by pcr analysis of flow-sorted chromosomes, was used to analyze the evolutionary rearrangements of the human 3q21.3-syntenic region in orangutan, siamang gibbon, and silvered-leaf monkey. three independent evolutionary breakpoints were localized within a 230-kb segment contained in bacs rp11-93k22 and rp11-77p16. approximately 200 kb of the human 3 ... | 2005 | 15607420 |
| the boundary of macaque rdna is constituted by low-copy sequences conserved during evolution. | in macaca mulatta, the single rdna array is flanked by a patchwork of sequences including subregions of human yp11.2, 4q35.2, and 10p15.3. this composite dna region is characterized by unique or low-copy sequences, resembling a potentially transcribed region. the analysis of cercopithecus aethiops, presbytis cristata, and hylobates lar suggests that this complex sequence organization could be shared by old world monkey and lesser ape species. after the lesser apes/great apes divergence, the uniq ... | 2006 | 16765020 |
| patterns of reproduction in malayan silvered leaf monkeys at the bronx zoo. | within phylogenetic limits reproductive characteristics of a given species may vary between populations in response to ecological and social factors. for instance, in environments where high quality nutrition is readily available, the onset and speed of reproduction are often accelerated. other influencing factors might be maternal experience or the sex of the infant. here we present data on reproductive characteristics for the silvered leaf monkey (trachypithecus cristatus), a medium-sized asia ... | 2009 | 19472173 |
| folivory or fruit/seed predation for mesopithecus, an earliest colobine from the late miocene of eurasia? | here we compare dental microwear textures from specimens of the fossil genus mesopithecus (cercopithecidae, colobinae) from the late miocene of eastern europe with dental microwear textures from four extant primate species with known dietary differences. results indicate that the dental microwear textures of mesopithecus differ from those of extant leaf eaters alouatta palliata and trachypithecus cristatus and instead resemble more closely those of the occasional hard-object feeders cebus apella ... | 2009 | 19733899 |
| use of a mycobacterium tuberculosis rapid lateral flow test for assessment of non-specific tuberculin responses in silvered langurs (trachypithecus cristatus ultima). | nonspecific responses to intradermal tuberculin skin testing (tst) have been frequently documented in silvered langurs (trachypithecus cristatus ultima) at the wildlife conservation society's bronx zoo. a commercial rapid lateral flow immunoassay (rt) for the identification of mycobacterium tuberculosis and m. bovis antibodies was employed to assess this test's correlation with tst results and tuberculosis status. twenty-two silvered langurs were tested with both tst and rt. tst results were cha ... | 2010 | 20597236 |
| a comparative study of growth patterns in crested langurs and vervet monkeys. | the physical growth patterns of crested langurs and vervet monkeys are investigated for several unilinear dimensions. long bone lengths, trunk height, foot length, epiphyseal fusion of the long bones and the pelvis, and cranial capacity are compared through six dental growth stages in male trachypithecus cristatus (crested langurs) and cercopithecus aethiops (vervet monkeys). results show that the body elements of crested langurs mature differently than those of vervets. in some dimensions, lang ... | 2011 | 22567303 |
| study of the mitochondrial transcription factor a (tfam) gene in the primate presbytis cristata. | the mitochondrial transcription factor a (tfam) is a member of the hmg-box protein family, necessary for both transcription and maintenance of mitochondrial dna. the gene is structured in seven exons and six introns and it is estimated to span about 10 kb in mouse, human and rat. in addition to the full length mrna of tfam, a shorter mrna isoform lacking exon 5 has been found to be widely distributed in human and rat tissues. here we present the isolation and characterization of tfam gene in the ... | 2005 | 15978747 |
| chronic moderate heat dermatitis (erythema ab igne) in five dogs, three cats and one silvered langur. | erythema ab igne, an old and rare disease in the human literature, is an erythematous, often pigmented, reticular, macular dermatosis that occurs at the site of repeated exposure to moderate heat. we identified lesions consistent with erythema ab igne in five dogs, three cats and one silvered langur (trachypithecus cristatus[raffles, 1821]). in dogs and cats, the cutaneous lesion distribution typically reflected chronic exposure to moderate heat during lateral or sternal recumbency. the silvered ... | 2002 | 12358613 |
| mapping homology between human and black and white colobine monkey chromosomes by fluorescent in situ hybridization. | we used in situ hybridization of chromosome specific dna probes ("chromosome painting") of all human chromosomes to establish homologies between the human and the white and black colobus (colobus guereza 2n = 44). the 24 human paints gave 31 signals on the autosomes (haploid male chromosomes homologus to human 14 and 15, 21 and 22, form colobine chromosomes 6 and 16, respectively. reciprocal translocations were found between human chromosomes 1 and 10, 1 and 17, as well as 3 and 19. the alternat ... | 1997 | 9261510 |
| fluorescene in situ hybridization establishes homology between human and silvered leaf monkey chromosomes, reveals reciprocal translocations between chromosomes homologous to human y/5, 1/9, and 6/16, and delineates an x1x2y1y2/x1x1x2x2 sex-chromosome system. | we employed in situ hybridization of chromosome-specific dna probes ("chromosome painting") of all human chromosomes to establish homologies between the human and the silvered lead monkey karyotypes (presbytis cristata 2n = 44). the 24 human paints gave 30 signals on the haploid female chromosome set and 34 signals on the haploid male chromosome set. this difference is due to a reciprocal translocation between the y and an autosome homologous to human chromosome 5. this y/autosome reciprocal tra ... | 1997 | 9098501 |
| acquired immunodeficiency syndrome-like illness associated with systemic mycoplasma fermentans infection in a human immunodeficiency virus-negative homosexual man. | a 35-year-old homosexual man developed a composite nodal kaposi's sarcoma and peripheral t-cell lymphoma that were associated with a peripheral blood cd4-positive lymphocyte count of only 43/mm3. the patient subsequently developed pneumocystis carinii pneumonitis and eventually died due to disseminated cryptococcus neoformans. numerous premortem tests for the presence of human immunodeficiency virus (hiv) types 1 and 2 were negative by the enzyme-linked immunosorbent assay, western blot, viral i ... | 1993 | 8491493 |
| fatal systemic infections of nonhuman primates by mycoplasma fermentans (incognitus strain). | four silvered leaf monkeys inoculated with mycoplasma fermentans (incognitus strain) showed wasting syndromes and died in 7-9 months. infected animals had a late and transient antibody response to mycoplasmal infection. three monkeys revealed periodic mycoplasmal antigenemia. the one that had the most persistent antigenemia failed to mount a detectable antibody response and was the first to die of the infection. the control monkey was killed 8 months later, after the last of the infected animals ... | 1993 | 8399931 |
| chromosomal painting shows that "marked chromosomes" in lesser apes and old world monkeys are not homologous and evolved by convergence. | cytogeneticists have long held that the single pair of metacentric, nor-bearing "marked chromosomes" in lesser apes (hylobatidae) and old world monkeys (cercopithecidae) are homologous. hylobatids have sometimes been excluded from hominoidea (great apes and humans) and phylogenetically allied with the lower primates, primarily on the basis of this shared "trait." however, in situ hybridization of human chromosome-specific dna probes to chromosomes of hylobates lar, h. syndactylus, h. concolor, c ... | 1995 | 7956365 |
| chemotherapeutic effect of cgi 18041 against subperiodic brugia malayi infection in presbytis cristata. | cgi 18041, an adduct of benzothiazol isothiocyanate n-methyl piperazine, was evaluated for its antifilarial properties in subperiodic brugia malayi infected presbytis cristata. animals experimentally infected with 200-400 subperiodic brugia malayi infective larvae, were matched according to microfilaria density, infective dose, and duration of infection. they were then randomly assigned to various treatment and control groups. the compound was suspended in 1% tween 20 in distilled water, sonicat ... | 1995 | 7631131 |
| bancroftian filariasis. wuchereria bancrofti infection in the silvered leaf monkey (presbytis cristatus). | | 1983 | 6351630 |
| experimental wuchereria kalimantani infection in the leaf monkey, presbytis cristata. | | 1986 | 3729595 |
| effect of ivermectin against subperiodic brugia malayi infection in the leaf monkey, presbytis cristata. | ivermectin at single doses of 0.2-1.0 mg/kg body weight reduced the microfilarial counts of subperiodic brugia malayi in presbytis cristata by 59.9%-89.6% of initial counts, 4 weeks after treatment. adult filaricidal activity was poor, live adult worms being recovered from all animals at autopsy. there was no serious side effect at these doses. | 1988 | 3387410 |
| the pathology of lymphoreticular and genital tissues of silvered leaf monkeys (presbytis cristata) experimentally infected with wuchereria bancrofti. | the discovery of the silvered leaf monkey, presbytis cristata, as a suitable experimental host for the human filarial parasite, wuchereria bancrofti, opened the door for major advances in our understanding of the disease caused by this parasite. to study the pathogenesis of bancroftian filariasis in this model, 15 adult p. cristata which had been experimentally infected with 250 infective third-stage larvae of the parasite were examined. after inoculation with larvae, the monkeys were maintained ... | 1987 | 3327870 |
| fatal infection of silvered leaf monkeys with a virus-like infectious agent (vlia) derived from a patient with aids. | four silvered leaf monkeys, inoculated with a virus-like infectious agent (vlia) derived from transformed nih/3t3 cells (sb51) transfected with kaposi's sarcoma dna of an aids patient, showed wasting syndromes and died in 7-9 months. two monkeys had a transient lymphadenopathy in earlier stages. two moribund animals showed lymphopenia. although 3 of the vlia inoculated monkeys had persistent low grade fever early in the infection, the animals became afebrile in the later stages. one vlia inocula ... | 1989 | 2712198 |
| antifilarial activity of intravenous suramin and oral diethylcarbamazine citrate on subperiodic brugia malayi in the leaf-monkey, presbytis cristata. | the known filaricides, suramin and diethylcarbamazine citrate, were tested against subperiodic brugia malayi infection in the leaf-monkey, presbytis cristata. as expected, intravenous suramin at 10 mg/kg daily x 5 days or 17 mg/kg weekly x 5 weeks, did not show any microfilaricidal activity, but substantially reduced the recovery of live adult worms to 50.6% and 13.6% of controls respectively. oral diethylcarbamazine citrate at 6 mg/kg daily x 6 or 10 days reduced final microfilarial counts to 3 ... | 1990 | 2387979 |
| antifilarial activity of cgp 20376 against subperiodic brugia malayi in the leaf-monkey presbytis cristata. | cgp 20376, a 5-methoxyl-6-dithiocarbamic-s- (2-carboxy-ethyl) ester derivative of benzothiazole was evaluated for its antifilarial properties and shown to be extremely effective against subperiodic brugia malayi in the leaf-monkey, presbytis cristata at oral doses of 20-100 mg/kg. the compound and/or its metabolites had complete micro- and microfilaricidal activities even when given at a single dose of 20 mg/kg. lower doses had incomplete filaricidal action. | 1990 | 2339241 |
| experimental infection of the leaf-monkey, presbytis cristata, with subperiodic brugia malayi. | presbytis cristata monkeys infected through the inoculation of between 200 and 400 subperiodic brugia malayi infective larvae (l3) in the right thigh, in both thighs or in the dorsum of the right foot were followed up for varying periods of up to about 8 months after infection. all 148 inoculated animals became patent, with mean prepatent periods being between 66 and 76 days. in animals injected in the thigh, the patterns of microfilaraemia were similar, there being a rapid rise in the geometric ... | 1990 | 2251244 |
| the need for specifying species concepts: how many species of silvered langurs (trachypithecus cristatus group) should be recognized? | | 2008 | 18675366 |
| survival patterns and mortality in the north american population of silvered leaf monkeys (trachypithecus cristatus). | this study examines mortality in the north american (n.a.) population of silvered leaf monkeys (trachypithecus cristatus) maintained in association of zoos and aquarium's zoos. understanding the causes of death associated with mortality rates (mr) can highlight relative susceptibility to intrinsic/extrinsic factors and differences between age and sex classes. overall, life tables can provide insight into a species' population dynamics. we expect that the mr will fit the general mammalian and pri ... | 2013 | 23575867 |
| first detailed reconstruction of the karyotype of trachypithecus cristatus (mammalia: cercopithecidae). | the chromosomal homologies of human (homo sapiens = hsa) and silvered leaf monkey (trachypithecus cristatus = tcr) have been previously studied by classical chromosome staining and by fluorescence in situ hybridization (fish) applying chromosome-specific dna probes of all human chromosomes in the 1980s and 1990s, respectively. | 2013 | 24341374 |
| complete mitochondrial genome of the trachypithecus cristatus. | in this study, the complete mitochondrial genome of trachypithecus cristatus was determined using pcr method. the mitochondrial genome is 16,557 bp in length, it containing 13 protein-coding genes, 2 ribosomal rna genes, 22 transfer rna genes and a control region. the structural organization and gene order of t. cristatus mtdna were similar to that of most other vertebrates. the results could provide useful information for further studies on phylogenetics of t. cristatus. | 2016 | 24975742 |
| variability of a vestigial structure: first metacarpal in colobus guereza and ateles geoffroyi. | a tenet of evolutionary theory is that, under conditions of stabilizing selection, phenotypic variability is inversely related to selection intensity. correspondingly, a nonfunctional, vestigial structure is expected to be highly variable relative to its functional homologue. this study tests the hypothesis that species with a vestigial pollex, colobus guereza and ateles geoffroyi, have a first metacarpal whose length is both highly variable relative to, and poorly correlated with, the lengths o ... | 1997 | 28565353 |
| molar microwear textures and the diets of australopithecus anamensis and australopithecus afarensis. | many researchers have suggested that australopithecus anamensis and australopithecus afarensis were among the earliest hominins to have diets that included hard, brittle items. here we examine dental microwear textures of these hominins for evidence of this. the molars of three au. anamensis and 19 au. afarensis specimens examined preserve unobscured antemortem microwear. microwear textures of these individuals closely resemble those of paranthropus boisei, having lower complexity values than au ... | 2010 | 20855308 |
| enamel microwear texture properties of igf 11778 (oreopithecus bambolii) from the late miocene of baccinello, italy. | late miocene oreopithecus bambolii has been posited as a folivore from its pronounced molar shearing crests. however, scanning electron microscopy yields conflicting results with one study of oreopithecus showing folivory and another indicating a coarser diet was consumed. to address this debate, the dietary proclivities of the well-known igf 11778 oreopithecus bambolii specimen are reconstructed by comparing the enamel texture properties of this specimen to extant alouatta palliata (n = 11), ce ... | 2013 | 23833018 |
| nonhuman primate retroviruses from cambodia: high simian foamy virus prevalence, identification of divergent stlv-1 strains and no evidence of siv infection. | nonhuman primates (nhps) carry retroviruses such as simian immunodeficiency viruses (siv), simian t-cell lymphotropic viruses (stlv) and simian foamy viruses (sfv). here, we revisited nhps from cambodia to assess the prevalence and diversity of these retroviruses using updated viral detection tools. we screened blood from 118 nhps consisting of six species (macaca fascicularis (n=91), macaca leonine (n=8), presbytis cristata (n=3), nycticebus coucang (n=1), hylobates pileatus (n=14), and pongo p ... | 2013 | 23612320 |
| silvered leaf-monkeys (presbytis cristatus). ii. gastrointestinal parasites and their treatment. | | 1974 | 4362877 |
| mitochondrial phylogeny, taxonomy and biogeography of the silvered langur species group (trachypithecus cristatus). | with a distribution ranging from mainland southeast asia to the sunda region, the silvered langur species group is the most widely distributed species complex of the genus trachypithecus. however, the systematic classification of its members and the phylogenetic relationships among them are less understood, leading to different classification schemes and proposed distribution zones. to address these issues, we sequenced a 573 bp long fragment of the mitochondrial cytochrome b gene from 115 silve ... | 2008 | 18406631 |
| genital swellings in silvered langurs: what do they indicate? | the occurrence of genital swellings was examined in adult female silvered langurs (trachypithecus cristatus). in contrast to the exaggerated swellings found in cercopithecines and apes, genital swellings in silvered langurs are confined to the vulva and the surrounding perineum, but they may nevertheless convey information similar to that of exaggerated swellings (i.e., correlate with the receptive period and fertility). if so, genital swellings would be expected to occur most frequently in cycl ... | 2007 | 17154387 |
| a comparative evaluation of thermal camera and visual counting methods for primate census in a riparian forest at the lower kinabatangan wildlife sanctuary (lkws), malaysian borneo. | a number of primate census techniques have been developed over the past half-century, each of which have advantages and disadvantages in terms of resources required by researchers (e.g., time and costs), availability of technologies, and effectiveness in different habitat types. this study aims to explore the effectiveness of a thermal imaging technique to estimate the group size of different primate species populations in a degraded riparian forest in the lower kinabatangan wildlife sanctuary ( ... | 2020 | 32572697 |
| association of antimicrobial resistance and gut microbiota composition in human and non-human primates at an urban ecotourism site. | the rise of nature-based ecotourism in the past decade has introduced unprecedented challenges in managing the increasing interaction between humans and animals. the potential transmission of antibiotic resistant microbes between humans and non-human primate populations is a concern due to their genetic similarity. malaysia is well known for hotspots of wildlife diversity where non-human primates like monkeys and orangutans have become popular tourist attractions. in this study, we assessed the ... | 2020 | 32175011 |
| rapid emergence of independent "chromosomal lineages" in silvered-leaf monkey triggered by y/autosome translocation. | sex/autosome translocations are rare events. the only known example in catarrhines is in the silvered-leaf monkey. here the y chromosome was reciprocally translocated with chromosome 1. the rearrangement produced an x1x2y1y2 sex chromosome system. at least three chromosomal variants of the intact chromosome 1 are known to exist. we characterized in high resolution the translocation products (y1 and y2) and the polymorphic forms of the intact chromosome 1 with a panel of more than 150 human bac c ... | 2018 | 29459623 |
| long-term surveillance of langur alphaherpesvirus in a zoo population of silvered langurs ( trachypithecus cristatus). | langur alphaherpesvirus (hvl), a provisionally named alphaherpesvirus in the simplexvirus genus, was first identified in 1991 at the bronx zoo in wild-origin silvered langurs ( trachypithecus cristatus) and their descendants. hvl is closely related to b virus ( macacine alphaherpesvirus 1) based on serologic and genetic data, but its natural history and zoonotic potential remain unknown. a cohort study was undertaken to describe the epidemiology, clinical impact, and potential management implica ... | 2018 | 29900798 |
| functional decline of sweet taste sensitivity of colobine monkeys. | for many primates, sweet taste is palatable and is an indicator that the food contains carbohydrates, such as sugars and starches, as energy sources. however, we have found that asian colobine monkeys (lutungs and langurs) have low sensitivity to various natural sugars. sweet tastes are recognized when compounds bind to the sweet taste receptor tas1r2/tas1r3 in the oral cavity; accordingly, we conducted a functional assay using a heterologous expression system to evaluate the responses of javan ... | 2018 | 30191350 |
| silvered leaf-monkeys (presbytis cristatus). i. colony management, caging, diet, and biologic values. | | 1974 | 4362876 |
| history of the tfam gene in primates. | tfam is a single copy nuclear gene mapping on chromosome 10 in human and mouse, 20 in rat and 12 in presbytis cristata. it encodes for an hmg (high-mobility-group) protein showing a high affinity with the two transcriptional promoters and other mitochondrial dna regions. it is an activator of mitochondrial transcription acting in the presence of mitochondrial rna polymerase and of transcription factor b. other interesting features of tfam gene in human and rat are reported such as the existence ... | 2005 | 16202542 |
| structural and mechanical indicators of limb specialization in primates. | the structural mechanics of femora and humeri from primates representing a wide spectrum of habitual locomotor activities were examined to determine how cross-sectional properties vary with functional specializations of the extremities. average bending rigidities of the midshaft of humerus and femur were measured in 60 individuals of four nonhuman primate species (macaca nemestrina, macaca fascicularis, presbytis cristata, hylobates lar) using single-beam photon absorptiometry. linear regression ... | 2013 | 4093079 |