It is reported the present distribution of Biomphalaria glabrata (Say, 1818) in the S. Paulo State. The presence of this intermediate host of schistosomiasis is at the present time recorded in 27 municipalities. This snail had been identified as the most important transmissor of the disease in several places in Brazil. The probable dispersion mechanisms involved in the distribution of the snail are commented on.
Biomphalaria glabrata; Schistosomiasis mansoni; Epidemiology surveillance