Innate susceptibility differences in chinook salmon Oncorhynchus tshawytscha to Loma salmonae (Microsporidia)

Diseases of Aquatic Organisms

M. L. Kent¹  M. L. Adamson¹  R. W. Shaw¹ 

关键词: Loma salmonae;    Microsporidia;    Innate susceptibility;   

DOI  :  10.3354/dao043049

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

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 theSouthern 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.

【 授权许可】

Unknown