Susceptibility of Three Species of Anadromous Salmonids to Experimentally Induced Infections withMyxobolus cerebralis, the Causative Agent of Whirling Disease

Autor:	Elizabeth MacConnell, Marios P. Georgiadis, Ronald P. Hedrick, Kaveramma Mukkatira, Terry S. McDowell
Rok vydání:	2001
Předmět:	endocrine system Chinook wind Fish migration animal structures biology urogenital system Ecology animal diseases Zoology Aquatic animal Aquatic Science biology.organism_classification Parasite hosting Oncorhynchus Enzootic Rainbow trout Myxobolus cerebralis
Zdroj:	Journal of Aquatic Animal Health. 13:43-50
ISSN:	1548-8667 0899-7659
DOI:	10.1577/1548-8667(2001)013<0043:sotsoa>2.0.co;2
Popis:	The susceptibility of three species of anadromous salmonids to whirling disease was examined after their experimental exposures to the infectious stages of Myxobolus cerebralis. Chinook salmon Oncorhynchus tshawytscha exposed as alevins were very susceptible to infection; the appearance of clinical signs, prevalence of infection, severity of microscopic lesions, and spore counts at 130 d postexposure are similar to those of age-matched rainbow trout O. mykiss exposed at the same dose. In contrast, coho salmon O. kisutch demonstrated no clinical signs of infection and had a lower prevalence of infection and spore numbers than did the exposed rainbow trout. A comparison of two strains of steelhead (anadromous rainbow trout), one from an enzootic site (San Lorenzo River) where M. cerebralis has been present for the past 35 years and a second from a site where the parasite is not found (Dry Creek), showed them both to be highly susceptible to experimental infections with M. cerebralis. These controll...
Databáze:	OpenAIRE
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