Schistosomiasis risk is present in the country. The full extent of Schistosomiasis risk is unknown due to fragmentary research:
Risk is present throughout the island of São Tomé. The highest incidence rates are reported from the districts of Lobata, Água Grande and Mé-Zóchi. The full extent of Schistosomiasis risk on the island of Príncipe is unknown.
Risk of Schistosomiasis caused by: Schistosoma guineensis
The main intermediate host snail is: Bulinus forskalii