Spirocerca

Spirocerca

a genus of spiruroid nematodes in the family Spirocercidae.

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Spirocerca arctica

found in dog, fox and wolf.

Spirocerca lupi

found in domestic and wild Canidae and wild Felidae. The worms are located in the walls of the esophagus, the aorta and the stomach, and sometimes in other organs, persisting in nodules. The nodules may be large enough to cause obstruction of the esophagus and the aorta. The esophageal lesion converts to a fibrosarcoma or an osteosarcoma in a number of cases.

Spirocerca sanguinolenta

see S. lupi (above).