A study was conducted to determine the levels of infestation of gastro-intestinal parasites in 36 non-human primates (NHP) and 19 zoo keepers at the University of Ibadan Zoological Garden (UIZG) and Agodi Zoological Garden (AZG) in Ibadan, Nigeria. Freshly passed faecal samples were collected from NHP, zoo keepers, and from apparently healthy individuals (control). The faecal samples were processed using standard parasitological techniques. Twenty-two (61.1%) out of 36 NHP at UIZG and AZG were infested with gastro-intestinal parasites. Infestations at UIZG and AZG were 61.3% and 60%, respectively. All the red patas, mangabey and mandrill monkeys and 90.9% (10/11) of the green monkeys were infested. There were higher infestation rates in young NHP than in adults (P
Key words: Gastro-intestinal parasites, Helminths, Infestation, Primates, Prevalence, Zoos
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