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Medical Definition of Baylisascaris procyonis
1. A large roundworm commonly found in raccoons; has been the cause of human visceral larva migrans and ocular larva migrans, following accidental ingestion of embryonated Baylisascaris procyonis eggs in faeces of infected raccoons. Central nervous system tissue following systemic migration by larvae of Baylisascaris is thought to be due to cytotoxic eosinophil ungranule proteins released by the migration of these larvae. Can cause severe disease in a variety of wild and domestic animal species and in human beings. See: visceral larva migrans. (05 Mar 2000)