Prevalence and distribution of schistosomiasis in the Philippines: a review.

The known endemic areas in the Philippines are the provinces of Mindoro Oriental and Sorsogon in Southern Luzon; the provinces of North, East and Western Samar; Leyte; and Bohol in Eastern Visayas, and all the provinces of Mindanao with the exception of Misamis Oriental, Davao Oriental and Maguindanao. The total snail area in 22 affected provinces is estimated aorth latitude. There are 655,124 estimated cases out of 3,961,000 exposed population or a prevalence of 16.5% based on the results of stool surveys conducted by Regional Schistosomiasis Advisory Teams and projected to the total population in the endemic areas.