Journal
VETERINARY PARASITOLOGY
Volume 193, Issue 4, Pages 404-412Publisher
ELSEVIER
DOI: 10.1016/j.vetpar.2012.12.036
Keywords
Baylisascaris procyonis; Baylisascaris schroederi; Baylisascaris transfuga; Bear; Giant panda; Raccoon; Larva migrans
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The nematode genus Baylisascaris (order Ascaridida, superfamily Ascaridoidea) contains nine relatively host-specific, parasite species of carnivores, omnivores, herbivores, carnivorous marsupials or rodents. They have a facultative heteroxenous life cycle, at least under experimental conditions. Eggs passed in faeces embryonate in the environment and the second-stage larva infective for both definitive and intermediate hosts develops. In intermediate hosts larvae migrate extensively through tissues, where they grow and moult to the third-stage, causing extensive damage. All Baylisascaris spp. are considered a potential cause of visceral, ocular and/or neural larval migrans in mammals including humans and in birds. This paper summarises our current knowledge on the prevalence, biology, pathogenicity and zoonotic significance of three Baylisascaris species: B. transfuga, B. schroederi and B. pro cyonis which have as definitive hosts bears, giant pandas and raccoons (occasionally dogs), respectively. (C) 2012 Elsevier B.V. All rights reserved.
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