Susceptibility of three species of anadromous salmonids to experimentally induced infections with Myxobolus cerebralis, the causative agent of whirling disease.

摘要: Abstract The susceptibility of three species anadromous salmonids to whirling disease was examined after their experimental exposures the infectious stages Myxobolus cerebralis. Chinook salmon Oncorhynchus tshawytscha exposed as alevins were very susceptible infection; appearance clinical signs, prevalence infection, severity microscopic lesions, and spore counts at 130 d postexposure are similar those age-matched rainbow trout O. mykiss same dose. In contrast, coho kisutch demonstrated no signs infection had a lower numbers than did trout. A comparison two strains steelhead (anadromous trout), one from an enzootic site (San Lorenzo River) where M. cerebralis has been present for past 35 years second parasite is not found (Dry Creek), showed them both be highly infections with These controll...