Piscirickettsia salmonis gen. nov., sp. nov., the Causative Agent of an Epizootic Disease in Salmonid Fishes

1992/01/01 by J. L. Fryer, C. N. Lannan, Stephen J. Giovannoni +3 · 258 citations
Immunology and Microbiology · #16S ribosomal RNA #Anatomy #Aquaculture disease management and microbiota #Bacteria #Biology #Ecology #Epizootic #Genetics #Host (biology) #Microbial infections and disease research #Microbiology #Parasitic Infections and Diagnostics #Pathogen #Strain (injury) #Virology #Virus #Wolbachia #Zoology

paper · doi:10.1099/00207713-42-1-120

published in International Journal of Systematic Bacteriology 42(1), 120-126 (Microbiology Society)

openalex publication_date 1992/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

A novel intracellular pathogen morphologically similar to the ehrlichiae has been isolated in cell culture and identified as the cause of an epizootic disease of salmonid fish. Like the ehrlichiae, the salmonid pathogen, designated strain LF-89, replicates within membrane-bound cytoplasmic vacuoles in host cells. This agent is the first with characteristics of this type to be isolated from a fish. Analysis of the LF-89 16S rRNA indicated that, unlike the ehrlichiae, LF-89 is a gamma proteobacterium distantly related to Coxiella burnetii and perhaps Wolbachia persica. A new genus and species (Piscirickettsia salmonis gen. nov., sp. nov.) are proposed for this organism, with ATCC(R) VR 1361 as the type strain.

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