Changing patterns in the distribution of the Mayaro virus vector Haemagogus species in Trinidad, West Indies. The Mayarovirusdisease (MAYVD) is an emerging mosquito borne zoonosis that was first reported on the island of Trinidad in 1954. The viral agent for this disease is known to presently be endemic to Central and South America. The enzootic cycle of the Mayaro virus (MAYV) is not fully