Acute Schistosoma infection is often asymptomatic, but chronic illness is frequent and manifests in different ways according to the location of the parasite, involving the gastro-intestinal, urinary or neurological system.
Äkillinen Schistosoma -infektio on usein oireeton, mutta se aiheuttaa usein kroonisen sairauden. Oireet vaihtelevat sen mukaan, onko loinen hakeutunut maha-suolikanavaan, virtsaelimiin tai hermostoon.