[Retrospective study of 1,934 cases of strongyloidiasis diagnosed in Paris (1970-1986). I. Geographic origin. Epidemiology].

The geographic origins of the 1,934 strongyloidiasis cases were as follows: 1,211 cases originated from the West Indies, most of whom resided in France. From 1973 to 1986 the prevalence decreased from 47 to 30% for men, and from 30% to 17% for women. 433 cases originated from other intertropical countries, 257 of which were from 4 prevalence zones of Africa: 4.5% Mauritania, Mali, Niger; 9% Senegal, Burkina Faso, Togo, Zaïre; 23% Guinea, Nigeria, Congo, Cameroon; 32% Ivory Coast, Gabon. 235 cases were French who had live, fought or travelled abroad (mainly Indochina and Africa). 33 Europeans of rural origin, infected in their country (2 in France?). 8 French cases infected in France (2 in Spain or Italy?).