Publications

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gastrointestinal parasites of the colobus monkeys of uganda.from august 1997 to july 2003, we collected 2,103 fecal samples from free-ranging individuals of the 3 colobus monkey species of uganda-the endangered red colobus (piliocolobus tephrosceles), the eastern black-and-white colobus (colobus guereza), and the angolan black-and-white colobus (c. angolensis)--to identify and determine the prevalence of gastrointestinal parasites. helminth eggs, larvae, and protozoan cysts were isolated by sodium nitrate flotation and fecal sedimentation. coprocultures ...200516108549
parasite prevalence and richness in sympatric colobines: effects of host density.factors that influence proximity and the number and duration of contacts among individuals can influence parasite transmission among hosts, and thus parasite prevalence and species richness are expected to increase with increasing host density. to examine this prediction we took advantage of a unique situation. following the clearing of a forest fragment that supported red colobus (piliocolobus tephrosceles) and black-and-white colobus (colobus guereza), the animals moved into a neighboring frag ...200516229007
do food availability, parasitism, and stress have synergistic effects on red colobus populations living in forest fragments?identifying factors that influence animal density is a fundamental goal in ecology that has taken on new importance with the need to develop informed management plans. this is particularly the case for primates as the tropical forest that supports many species is being rapidly converted. we use a system of forest fragments adjacent to kibale national park, uganda, to examine if food availability and parasite infections have synergistic affects on red colobus (piliocolobus tephrosceles) abundance ...200616958077
morphology of enterobius (colobenterobius) colobis vuylstéke, 1964 (nematoda: oxyuridae: enterobiinae) collected from an ashy red colobus, procolobus rufomitratus tephrosceles (elliot, 1907) (primates: cercopithecidae: colobinae), in uganda.enterobius (colobenterobius) colobis vuylstéke, 1964 (nematoda: oxyuridae) is redescribed based on males and females collected from an ashy red colobus, procolobus rufomitratus tephrosceles (elliot, 1907) (primates: cercopithecidae: colobinae), in uganda. two morphotypes are recognized among females, which are readily distinguished by tail length, termination level of lateral alae, and egg size. the relative position of cellular wall greatly varied in the ovijector, indicating its limited system ...200818973417
coinfection of ugandan red colobus (procolobus [piliocolobus] rufomitratus tephrosceles) with novel, divergent delta-, lenti-, and spumaretroviruses.nonhuman primates host a plethora of potentially zoonotic microbes, with simian retroviruses receiving heightened attention due to their roles in the origins of human immunodeficiency viruses type 1 (hiv-1) and hiv-2. however, incomplete taxonomic and geographic sampling of potential hosts, especially the african colobines, has left the full range of primate retrovirus diversity unexplored. blood samples collected from 31 wild-living red colobus monkeys (procolobus [piliocolobus] rufomitratus te ...200919692478
novel, divergent simian hemorrhagic fever viruses in a wild ugandan red colobus monkey discovered using direct pyrosequencing.simian hemorrhagic fever virus (shfv) has caused lethal outbreaks of hemorrhagic disease in captive primates, but its distribution in wild primates has remained obscure. here, we describe the discovery and genetic characterization by direct pyrosequencing of two novel, divergent shfv variants co-infecting a single male red colobus monkey from kibale national park, uganda.201121544192
fecal microbiomes of non-human primates in western uganda reveal species-specific communities largely resistant to habitat perturbation.primate gastrointestinal microbial communities are becoming increasingly appreciated for their relevance to comparative medicine and conservation, but the factors that structure primate "microbiomes" remain controversial. this study examined a community of primates in kibale national park, uganda, to assess the relative importance of host species and location in structuring gastrointestinal microbiomes. fecal samples were collected from primates in intact forest and from primates in highly distu ...201324285224
parasitology of five primates in mahale mountains national park, tanzania.parasitological surveillance in primates has been performed using coprological observation and identification of specimens from chimpanzees (pan troglodytes schweinfurthii) in mahale mountains national park, tanzania (mahale). in this study, we conducted coprological surveillance to identify the fauna of parasite infection in five primate species in mahale: red colobus (procolobus badius tephrosceles), red-tailed monkeys (cercopithecus ascanius schmidti), vervet monkeys (cercopithecus aethiops p ...201222661394
divergent simian arteriviruses cause simian hemorrhagic fever of differing severities in macaques.simian hemorrhagic fever (shf) is a highly lethal disease in captive macaques. three distinct arteriviruses are known etiological agents of past shf epizootics, but only one, simian hemorrhagic fever virus (shfv), has been isolated in cell culture. the natural reservoir(s) of the three viruses have yet to be identified, but african nonhuman primates are suspected. eleven additional divergent simian arteriviruses have been detected recently in diverse and apparently healthy african cercopithecid ...201626908578
high genetic diversity and adaptive potential of two simian hemorrhagic fever viruses in a wild primate population.key biological properties such as high genetic diversity and high evolutionary rate enhance the potential of certain rna viruses to adapt and emerge. identifying viruses with these properties in their natural hosts could dramatically improve disease forecasting and surveillance. recently, we discovered two novel members of the viral family arteriviridae: simian hemorrhagic fever virus (shfv)-krc1 and shfv-krc2, infecting a single wild red colobus (procolobus rufomitratus tephrosceles) in kibale ...201424651479
genome-wide patterns of gene expression in a wild primate indicate species-specific mechanisms associated with tolerance to natural simian immunodeficiency virus infection.over 40 species of nonhuman primates host simian immunodeficiency viruses (sivs). in natural hosts, infection is generally assumed to be nonpathogenic due to a long coevolutionary history between host and virus, although pathogenicity is difficult to study in wild nonhuman primates. we used whole-blood rna-seq and siv prevalence from 29 wild ugandan red colobus (piliocolobus tephrosceles) to assess the effects of siv infection on host gene expression in wild, naturally siv-infected primates. we ...201931106820
genomic resources notes accepted 1 december 2014 - 31 january 2015.this article documents the public availability of (i) transcriptome sequence data and assembly for the rostrum dace (leuciscus burdigalensis) naturally infected by a copepod ectoparasite (tracheliastes polycolpus) and (ii) snps identified and validated from rad sequencing for the ugandan red colobus (procolobus rufomitratus tephrosceles) using rad sequencing.201525857929
sickness behaviour associated with non-lethal infections in wild primates.non-lethal parasite infections are common in wildlife, but there is little information on their clinical consequences. here, we pair infection data from a ubiquitous soil-transmitted helminth, the whipworm (genus trichuris), with activity data from a habituated group of wild red colobus monkeys (procolobus rufomitratus tephrosceles) in kibale national park, uganda. we use mixed-effect models to examine the relationship between non-lethal parasitism and red colobus behaviour. our results indicate ...201526311670
a multicomponent animal virus isolated from mosquitoes.rna viruses exhibit a variety of genome organization strategies, including multicomponent genomes in which each segment is packaged separately. although multicomponent genomes are common among viruses infecting plants and fungi, their prevalence among those infecting animals remains unclear. we characterize a multicomponent rna virus isolated from mosquitoes, designated guaico culex virus (gcxv). gcxv belongs to a diverse clade of segmented viruses (jingmenvirus) related to the prototypically un ...201627569558
cis-regulatory evolution in a wild primate: infection-associated genetic variation drives differential expression of mhc-dqa1 in vitro.few studies have combined genetic association analyses with functional characterization of infection-associated snps in natural populations of nonhuman primates. here, we investigate the relationship between host genetic variation, parasitism and natural selection in a population of red colobus (procolobus rufomitratus tephrosceles) in kibale national park, uganda. we collected parasitological, cellular and genomic data to test the following hypotheses: (i) mhc-dqa1 regulatory genetic variation ...201728665019
characterization of the fecal microbiome from non-human wild primates reveals species specific microbial communities.host-associated microbes comprise an integral part of animal digestive systems and these interactions have a long evolutionary history. it has been hypothesized that the gastrointestinal microbiome of humans and other non-human primates may have played significant roles in host evolution by facilitating a range of dietary adaptations. we have undertaken a comparative sequencing survey of the gastrointestinal microbiomes of several non-human primate species, with the goal of better understanding ...201021103066
prediction of parasite infection dynamics in primate metapopulations based on attributes of forest fragmentation.although the effects of forest fragmentation on species and ecological processes have been the focus of considerable research in conservation biology, our capacity to predict how processes will be altered and which taxonomic or functional groups will be most affected by fragmentation is still poor. this problem is exacerbated by inherent temporal and spatial variability in fragment attributes. to improve our understanding of this interplay, we examined how various fragment attributes affect one ...200616903105
life on the edge: gastrointestinal parasites from the forest edge and interior primate groups.humans are responsible for massive changes to primate habitats, and one unanticipated consequence of these alterations may be changes in host-parasite interactions. edges are a ubiquitous aspect of human disturbance to forest landscapes. here we examine how changes associated with the creation of edges in kibale national park, uganda, alter the parasite community that is supported by two species of african colobines: the endangered red colobus (piliocolobus tephrosceles) and the black-and-white ...200616534810
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