Recent evidence of emerging human diseases with origins or likely transmission to humans, or both, that involve primates and a greater recognition of the risk of human pathogen transmission to free-ranging primates have raised awareness of the potential impact of zoonotic pathogen transmission on primate conservation and nonhuman primate and human health. As human population density continues to increase exponentially, speeding the reduction and fragmentation of primate habitats, greater human-primate contact is inevitable and even higher rates of pathogen transmission are likely. Thus interest has grown in collecting baseline data on patterns of parasitic infections in wild primate populations to provide an index of population health and to begin to assess and, to manage disease risks. Primatologists traditionally have been involved with such surveys through noninvasive assessment of gastrointestinal parasites. Unfortunately, previous studies have tended toward divergent methodologies, compromising the potential for longitudinal and comparative work. Here, I provide practical guidelines and standardized methodologies for the noninvasive assessment of gastrointestinal parasites of primates.

http://www.envs.emory.edu/faculty/GILLESPIE/publications/gillespie2006.pdf

Noninvasive Assessment of Gastrointestinal Parasite Infections in Free-Ranging Primates

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 (Co- lobus guereza), and the Angolan black-and-white colobus (C. angolensis)—to identify and determine the prevalence of gastro- intestinal parasites. Helminth eggs, larvae, and protozoan cysts were isolated by sodium nitrate flotation and fecal sedimentation. Coprocultures facilitated identification of helminths. Seven nematodes (Strongyloides fulleborni, S. stercoralis, Oesophagostomum sp., an unidentified strongyle, Trichuris sp., Ascaris sp., and Colobenterobius sp.), 1 cestode (Bertiella sp.), 1 trematode (Dicro- coeliidae), and 3 protozoans (Entamoeba coli, E. histolytica, and Giardia lamblia) were detected. Seasonal patterns of infection were not apparent for any parasite species infecting colobus monkeys. Prevalence of S. fulleborni was higher in adult male compared to adult female red colobus, but prevalence did not differ for any other shared parasite species between age and sex classes.

http://www.envs.emory.edu/faculty/GILLESPIE/publications/gillespieetal2005b.pdf

Gastrointestinal parasites of the colobus monkeys of uganda

Experimental and clinical parasitology need natural baselines or “controls”. We present normative data intestinal parasite loads in two genera of African primates. Wild Pan troglodytes and Papio spp. were studied at two sites: Gombe in Tanzania (P. anubis) and Mt. Assirik in Senegal (P. papio). Presence or absence of parasites, especially nematodes, was recorded from fecal specimens. Gombe's primates were more often infected than were Mt. Assirik's. At Gombe, but not at Mt. Assirik, chimpanzees seemed to have a higher incidence of infection than baboons. Comparison of three baboon troops yielded apparent differences in prevalence of infection. No differences in infection were found between the wet and dry seasons in Mt. Assirik's chimpanzees.

Intestinal parasites of sympatric Pan troglodytes and Papio spp. at two sites: Gombe (Tanzania) and Mt. Assirik (Senegal)

From January 1998 to December 2002, we collected 293 fecal samples from free-ranging individuals of the 4 guenon species of western Uganda, i.e., redtail guenons (Cercopithecus ascanius), blue monkeys (Cercopithecus mitis), l'hoesti monkeys (Cercopithecus lhoesti), and vervet monkeys (Cercopithecus aethiops), to quantify the prevalence of gastrointestinal parasites. Helminth eggs, larvae, and protozoan cysts were isolated by sodium nitrate flotation and fecal sedimentation. Helminth parasites were identified, and infection prevalence was determined for all 4 guenon species. Coprocultures facilitated identification of strongylate nematodes. For the most common species, the redtail guenon, we documented prevalence of protozoan parasites and examined the effect of season and host sex on infection prevalence. Six nematodes (Strongyloides fulleborni, Oesophagostomum sp., unidentified strongyle, Trichuris sp., Streptopharagus sp., and Enterobius sp.), 1 cestode (Bertiella sp.), 1 trematode (Dicrocoeliidae), and...

http://www.envs.emory.edu/faculty/GILLESPIE/publications/gillespieetal2004.pdf

Gastrointestinal parasites of the guenons of western uganda

Examinations of primate parasitic infections can inform both primatologists and parasitologists about evolutionary and ecological relationships. Interspecific, intraspecific, and interindividual variation in parasitic infections may correlate with environmental, demographic, behavioral, and human variables. Understanding these relationships is particularly important for conservation management issues for endangered species. We describe techniques for the noninvasive collection and preservation of fecal samples from wild primates and the salvaging of parasitological information from primate hosts in the field.

Primates and parasites: A case for a multidisciplinary approach

We compared the gastrointestinal parasites of the baboon,Papio cynocephalus ursinus, living in montane (altitude, >1800 m) and coastal lowland (altitude, 100–200 m) habitats in Natal, South Africa, using fecal analysis. While the montane animals harbored a smaller number of species, helminth egg-output rates were higher in them than in the lowland animals. The decrease in parasite diversity with increasing altitude was expected, but the difference in helminth egg output was not. It may be due to a combination of food shortage, which characterizes the montane environment, especially at the end of winter, and the high proportion of soil-contaminated items in the diets of the montane animals.

Environmental correlates of gastrointestinal parasitism in montane and lowland baboons in Natal, South Africa

One hundred twenty-two fecal samples were collected from two troops of chacma baboons (Papio ursinus),living in montane and subalpine grassland, trespectively. These were examined for the presence of gastrointestinal parasites. Five protozoan, six nematode, and two cestode species were identified. Identifications were based on the morphology of cysts in the case of Protozoaand of eggs in the case of helminths. Strongyle nematodes were tentatively identified on egg size ranges and larval characteristics.

The gastrointestinal parasites ofPapio ursinus from the Drakensberg Mountains, Republic of South Africa

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Environmental correlates of gastrointestinal parasitism in montane and lowland baboons in Natal, South Africa

The gastrointestinal parasites ofPapio ursinus from the Drakensberg Mountains, Republic of South Africa