Ollulanus tricuspis in a cat colony.

The symptoms and pathology of a domestic cat infected with Ollulanus are described. The subsequent investigation of the cat colony of which this cat was a member is detailed. It is concluded that Ollulanus tricuspis is a significant pathogen in the colony and that the management and housing of the colony may simulate the conditions under which Felidae in zoos have been shown to succumb to this parasite.