Salmonids Resistant toCeratomyxa shastaAre Susceptible to Experimentally Induced Infections withMyxobolus cerebralis

Autor:	Marios P. Georgiadis, Ronald P. Hedrick, Terry S. McDowell, Kaveramma Mukkatira, Elizabeth MacConnell
Rok vydání:	2001
Předmět:	endocrine system Fish migration animal structures biology urogenital system Ecology animal diseases Aquatic animal Aquatic Science biology.organism_classification digestive system Spore Microbiology Ceratomyxa shasta Rainbow trout Induced infections Pathogen Myxobolus cerebralis
Zdroj:	Journal of Aquatic Animal Health. 13:35-42
ISSN:	1548-8667 0899-7659
DOI:	10.1577/1548-8667(2001)013<0035:srtcsa>2.0.co;2
Popis:	Two strains of rainbow trout Oncorhynchus mykiss and one strain of steelhead (anadromous rainbow trout) previously shown to demonstrate resistance to the myxosporean pathogen Ceratomyxa shasta were found to be susceptible to experimentally induced infections with the myxosporean Myxobolus cerebralis. Laboratory exposures to waterborne infectious stages (triactinomyxons) of M. cerebralis of both strains of rainbow trout and the steelhead resulted in clinical signs of whirling disease, including the characteristic tail chasing and black tail, approximately 42–49 d after exposure at a water temperature of 15°C. At 5 months postexposure, the severity of microscopic lesions and spore concentrations in the head cartilage of all salmonids resistant to C. shasta were evaluated. The Iron Gate steelhead and the Pit River rainbow trout that were resistant to C. shasta had lesion scores and spore counts similar to those of control rainbow trout known to be susceptible to C. shasta. Evidence of some resistanc...
Databáze:	OpenAIRE
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