Identification of Infection in a Nonhuman Primate from St. Kitts More than 50 Years after Interruption of Human Transmission.

Transmission of was interrupted on St. Kitts, a Caribbean island, in the 1950s. With no reported cases since that time and most spp. snail populations eliminated based on surveys in the 1970s, has been considered eliminated on St. Kitts. In 2019, eggs were found in an African green monkey () that originated from St. Kitts. Nonhuman primate (NHP) infections have been considered incidental to human infections, with infections in NHPs resolving with the elimination of in the human population. An NHP with infection suggests that the NHP may be able to maintain a reservoir sylvatic cycle. Alternatively, transmission was not eliminated or has been reintroduced to St. Kitts. The occurrence of an infected NHP from St. Kitts supports the need for continuous monitoring in areas where is considered eliminated.