Schistosoma haematobium: the pathology of experimental infection.

The pathologic changes in experimental animals infected with Schistosoma haematobium are reviewed and compared to the pathology in infected humans. The clinically important lesions in persons infected with S. haematobium are generally confined to the urogenital system. In experimental animals, functionally important lesions of the urogenital system are the exception but do occur in a significant proportion of infected primates. The acute lesions of the urinary tract in primates are similar to those in infected persons. Chronic lesions characterized by the extensive submucosal accumulation of calcified eggs are common in infected humans but uncommon in S. haematobium-infected animals.