TitleInnate susceptibility differences in chinook salmon Oncorhynchus tshawytscha to Loma salmonae (Microsporidia).
Publication TypeJournal Article
Year of Publication2000
AuthorsShaw, RW, Kent, ML, Adamson, ML
JournalDis Aquat Organ
Volume43
Issue1
Pagination49-53
Date Published2000 Oct 25
ISSN0177-5103
KeywordsAnimals, Aquaculture, Disease Susceptibility, Fish Diseases, Gills, Histocytochemistry, Microsporidia, Microsporidiosis, Northwestern United States, Prevalence, Salmon
Abstract

Loma salmonae (Putz, Hoffman and Dunbar, 1965) Morrison & Sprague, 1981 (Microsporidia) is an important gill pathogen of Pacific salmon Oncorhynchus spp. in the Pacific Northwest. Three strains of chinook salmon O. tshawytscha were infected in 2 trials with L. salmonae by feeding of macerated infected gill tissue or per os as a gill tissue slurry. Intensity of infection was significantly higher in the Northern stream (NS) strain as compared to the Southern coastal (SC) and a hybrid (H) strain derived from these 2 strains. Both wet mount and histological enumeration of intensity of infection demonstrated strain differences. Survival in the NS strain was significantly lower than the other strains. The NS strain may represent a naive strain and be less able to mount an effective immune response against the parasite.

DOI10.3354/dao043049
Alternate JournalDis Aquat Organ
PubMed ID11129380