infection in captive black sakis (): a case report and implications for zoonotic transmission.

infections represent a major global health challenge, affecting both humans and non-human primates. In non-human primates, infections pose a significant threat to conservation efforts, as they can impact both captive and wild populations, causing complications ranging from mild to severe. This study reports the case of two black sakis () kept under human care in a zoo-a male and a female-presented for routine examination due to weight loss. Ultrasonography revealed a substantial intestinal infestation of large roundworms. The female was treated with pyrantel pamoate, and the male with fenbendazole, both with successful outcomes. The worms were sent for morphological and molecular identification, and the animals were submitted for new examinations. This case underscores the importance of preventive veterinary check-ups in zoos, particularly for parasites that pose zoonotic risks, to ensure both animal and human health.