STUDIES IN MALARIA EPIDEMIOLOGY IN NORTH VIETNAM. 1. TOPOGRAPHICAL MALARIOLOGICAL EXPLORATION OF THAI-NGUYEN PROVINCE
INSTITUTE FOR TECHNICAL TRANSLATIONS PHILADELPHIA PA
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By the method of routed, directed exploration of approximately 90 of the inhabited sites of the province, typing of the foci explored, and subsequent classification method of analogies of the unexplored foci, the province of Thai Nguyen was separated and classified into 4 zones the endemic-malaria mountain-river zone, the low mountain-river, and hilly-river zone, and the nonendemic sparsely populated high-mountain zone. The differences in the zones are attributed chiefly to the physical, geographical, and socio-economic features which affect the abundance of A. minimus and the degree of its contact with man.
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