Horizontal transmission of Piscirickettsia salmonis from the wild sub‐Antarctic notothenioid fish Eleginops maclovinus to rainbow trout (Oncorhynchus mykiss) under experimental conditions

Piscirickettsia salmonis is the aetiological agent of piscirickettsiosis, a bacterial disease that affects farmed salmonids, causing high mortalities and significant economic losses in the Chilean salmon farm industry. Given the Chilean native fish species Patagonian blenny, Eleginops maclovinus, li...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fish diseases 2021-07, Vol.44 (7), p.993-1004
Main Authors: Quintanilla, Juan Carlos, González, Margarita P., García, Juan Pablo, Olmos, Paola, Contreras‐Lynch, Sergio
Format: Article
Language:English
Subjects:
Aquaculture
Bacterial diseases
Cohabitation
cohabitation challenge
Economic impact
Economics
Eleginops maclovinus
Epidemiology
Farms
Fish
Freshwater fishes
Indigenous species
infection
Lesions
Marine fishes
Mortality
Necropsy
Oncorhynchus mykiss
Pathogens
Piscirickettsia salmonis
Salmon
Salmonids
transmission
Trout
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Piscirickettsia salmonis is the aetiological agent of piscirickettsiosis, a bacterial disease that affects farmed salmonids, causing high mortalities and significant economic losses in the Chilean salmon farm industry. Given the Chilean native fish species Patagonian blenny, Eleginops maclovinus, lives in the vicinity of salmon farms, it is relevant to clarify the epidemiological role that this species could play in the transmission and/or dissemination of this pathogen. This study aimed to evaluate the bidirectional transmission of P. salmonis between the Patagonian blenny and Oncorhynchus mykiss (rainbow trout), via a cohabitation challenge model. The results of this study demonstrated the transmission of the bacteria from Patagonian blennies to rainbow trout, considering the specific mortality in cohabitant rainbow trout, reaching 46%: the necropsy of these specimens, evidencing the characteristic pathological lesions of the disease and the positive results of the qPCR analysis for P. salmonis, in the same individuals. In contrast, no mortalities of Patagonian blenny specimens were recorded in the challenged experimental groups. This study is the first report showing the horizontal transmission of P. salmonis from a native non‐salmonid species, such as the Patagonian blenny, to a salmonid species, generating the disease and specific mortality in rainbow trout, using a cohabitation challenge.
ISSN:0140-7775
1365-2761
DOI:10.1111/jfd.13360