Experimental vaccination of rainbow trout against Loma salmonae using a live low-virulence variant of L. salmonae

Autor:	R. J. F. Markham, Simon R. M. Jones, J. G. Sanchez, D. J. Speare
Rok vydání:	2001
Předmět:	biology Aquatic animal Anatomy Aquatic Science biology.organism_classification Microsporidiosis medicine.disease Spore Microbiology Microsporidia medicine Parasite hosting Rainbow trout Xenoma Ecology Evolution Behavior and Systematics Salmonidae
Zdroj:	Journal of Fish Biology. 59:442-448
ISSN:	1095-8649 0022-1112
DOI:	10.1111/j.1095-8649.2001.tb00142.x
Popis:	Prior exposure of rainbow trout Oncorhynchus mykiss juveniles to the low-virulence variant of Loma salmonae, L. salmonae SV, spores resulted in a xenoma intensity in the gill filaments fourteen times lower (0.044 v. 0.641 xenomas per filament; P=0.0001) than that observed in the naive controls, challenged with L. salmonae spores, as determined morphometrically by in situ hybridization at the peak of the disease (between 4 and 6 weeks post exposure). The marked degree of reduction in numbers of xenomas that formed after challenge suggests that use of the low-virulence variants should be further considered as a means to protect fish in regions where the parasite is endemic, to protect them during grow out periods.
Databáze:	OpenAIRE
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