The Mekong schistosome, a species
described from the Mekong delta around Khong Island in southern Laos and northern
Cambodia. Infection rates are highest for ages 7 to 15; dogs
appear to be the chief reservoir
host; the intermediate host snail
is the 3 mm-long operculid snail, Tricula
aperta. Pathology is similar
usually smaller severe than that of Schistosoma japonicum.