Abstract
Cercariae of Trichobilharzia stagnicolae, T. physellae, and T. ocellata, all schistosomes of birds, penetrated the skin, migrated to the lungs, and produced pulmonary hemorrhages in laboratory mice. The migration of cercariae of T. ocellata was also studied in hamsters, guinea pigs, rabbits, and rhesas monkeys, and pulmonary hemorrhages were also found in these animals. Worms of all 3 spp. were recovered from the lungs of 1 or more of the 5 host spp., but none was recovered from the liver.

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