¹ Th e dis tribution of s ch is tos om ias is is ve ry focal; h ow e ve r, s urve illance for s ch is tos om ias is is lim ite d in m os t countrie s . Th e re fore , th is m ap s h ade s e ntire countrie s w h e re s ch is tos om i-as is trans m is s ion h as be e n re porte d. Th e e xce ption to th is is France w h e re s ch is tos om ias is h as be e n re porte d on s e ve ral is lands , s uch as Guade loupe , M artiniqu e , and Cors ica.

M AP 3 1 2. Distribution of schistosomiasis¹