Schistosoma mansoni Infection in Three Green Monkeys (Chlorocebus sabaeus) Originating from Saint Kitts

Schistosomiasis, a parasitic disease caused by trematodes of the genus Schistosoma , was eliminated on the island of Saint Kitts in the 1950s after an intense program that targeted the snail intermediate host and improved sanitation. However, recently, 3 cases of schistosomiasis were identified in green monkeys ( Chlorocebus sabaeus ) imported from Saint Kitts over a period of 5 months from December 2023 to April 2024. The 3 cases each had hepatic manifestations of the disease. In addition, one animal had disseminated disease affecting the cerebrum, cerebellum, brainstem, and lung and is the first described case of neuroschistosomiasis in a non-human primate (NHP) due to infection with Schistosoma mansoni.