A study of the epidemiology of yellow fever in west nile district, Uganda

Abstract

Yellow fever immunity in the West Nile District of Uganda is confined primarily to males, especially those living in or near forested areas. About 36% of the monkeys examined were also found to possess such immunity. With the exception of a single specimen of the red hog (Potamochoerus porcus), no non-primate was found to possess immunity. Of the 6 known mosquito vectors of the area, only Anopheles africanus and A. luteocephalus are of importance in the spread of yellow fever. The well-marked dry periods effectively control the mosquito population and may, therefore, partially explain the seasonal nature of outbreaks of yellow fever in man.