[Prevalence and worm burden of Schistosomiasis mansoni before and after collective treatment in Jaboatão dos Guararapes, Pernambuco, Brazil].

Objective: to evaluate the effectiveness of collective treatment for Schistosomiasis mansoni in two endemic localities in Jaboatão dos Guararapes-PE.

Methods: we described the prevalence of Schistosomiasis mansoni and the average parasite load before and after collective treatment in the period 2011-2013; data from the Schistosomiasis mansoni Information System and completion of sample surveys reports were used.

Results: there is a reduction in 8.