African map of schistosomiasis survey locations based on current progress of the GNTD database.

<p>Survey locations are represented by pink squares for <i>S. matthei</i>, blue diamonds for <i>S. margrebowiei</i>, yellow stars for <i>S. intercalatum</i>, green crosses for <i>S. bovis</i>, brown dots for <i>S. mansoni</i> and red triangles for <i>S. haematobium</i>. Surveys where subjects were screened for co-occurrence of multiple species are indicated with overlapping symbols.