Severe and fatal central nervous system disease in humans caused by Baylisascaris procyonis, the common roundworm of raccoons: a review of current literature

Microbes Infect. 2005 Feb;7(2):317-23. doi: 10.1016/j.micinf.2004.12.005. Epub 2005 Jan 8.


Baylisascaris procyonis, a parasitic infection of raccoons, causes severe neurologic disease in humans when infective eggs from raccoon feces are ingested. Definitive diagnosis is challenging, but can be made by isolation of larvae in brain biopsy or exclusion of other potential causes of eosinophilic meningoencephalitis. Prevention efforts are critical due to the lack of effective treatment.

Publication types

  • Review

MeSH terms

  • Animals
  • Ascaridida Infections / diagnosis*
  • Ascaridida Infections / physiopathology
  • Ascaridoidea*
  • Central Nervous System Helminthiasis / diagnosis*
  • Central Nervous System Helminthiasis / physiopathology
  • Humans
  • Raccoons / parasitology*
  • Severity of Illness Index
  • Species Specificity