Trematodes Experimental evidence suggests that trematodes are a source of limb abnormalities in Californian frog populations. Judy Helgen and the Minnesota Polution Control Agency Judy Helgen and the Minnesota Pollution Control Agency Lung flukes Lung flukes are common parasites in wild frogs. Normal lung tissue Tissue with a lung fluke Nematodes Amphibians and reptiles are hosts of hundreds of different types of nematodes, including ascarids and filarial worms. Many of these do not cause disease, but if they do it is often due to a blockage.
Frogs can serve as paratenic hosts of many parasites that eventually wind up in a mammalian host.