Trematodes

From Dog

Trematodes, or flukes, are relatively rare parasites in dogs and are commonly seen associated with consumption of raw meat. These parasites are often seen residing in the small intestine where they cause minimal pathology unless in large numbers.

Clinical signs in cats infected with pancreatic and liver flukes vary from asymptomatic to pancreatitis, cholangitis and cholecystitis. Treatment is effective with praziquantel at doses from 5 - 20 mg/kg weekly.

Species which have been reported to infect cats include:


Parasite Location in cat Intermediate host Geographical distribution
Acanthotrema felis jejunum snails(1st), fish(2nd) South-east Asia
Alaria spp small intestine snails(1st), fish(2nd) Worldwide
Apophallus donicum small intestine snails(1st), fish(2nd) North America and eastern Europe
Centrocestus spp jejunum snails(1st), fish(2nd) South-east Asia
Clonorchis sinensis bile duct snails(1st), fish(2nd) South-east Asia
Cryptocotyle lingua small intestine snails(1st), fish(2nd) USA, Canada, Japan, Siberia, and Europe
Echinochasmus schwartzi small intestine snails(1st), fish(2nd) South-east Asia, the Americas
Haplorchis pumilio jejunum snails(1st), fish(2nd) South-east Asia
Heterobilharzia spp mesenteric vein snails(1st), fish(2nd) North America
Heterophyes heterophyes small intestine snails(1st), fish(2nd) North Africa, Asia
Mesostephanus appendiculatum small intestine snails(1st), fish(2nd) North Africa, Asia
Metagonimus yokogawai small intestine snails(1st), fish(2nd) Asia
Nanophyetus salmincola duodenum, jejunum snails(1st), fish(2nd) North America, Russia
Opisthorchis felineus bile duct snails(1st), fish(2nd) South-east Asia
Paragonimus kellicotti lungs, skin snails(1st), crabs, crayfish(2nd) North America, Asia
Parametorchis complexus bile duct snails(1st), fish(2nd) South-east Asia
Prohemistomum vivax duodenum, jejunum snails(1st), fish(2nd) South-east Asia
Schistosoma japonicum duodenum, jejunum, urinary bladder snails(1st), fish(2nd) Asia, Americas
Stellantchasmus falcatus jejunum snails(1st), brackish water fish(2nd) South-east Asia
Stictodora spp jejunum snails(1st), brackish water fish(2nd) South-east Asia