A low Density of Tsetse Flies associated with a high Incidence of Sleeping Sickness

Abstract

In 1935, Dr. Anderson made a sleeping sickness survey of the Kudaru District of Zaria Emirate, Northern Nigeria, where he found a high incidence of the disease. In the extreme case of the small hamlet of Sambo, he recorded a 70 per cent, infection rate among the 43 inhabitants.The writer followed up this survey with an entomological investigation in the late dry season, and paid particular attention to. this hamlet.