Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-55287

Schmidt-Posthaus, H; Polkinghorne, A; Nufer, L; Schifferli, A; Zimmermann, D R; Segner, H; Steiner, P; Vaughan, L (2012). A natural freshwater origin for two chlamydial species, Candidatus Piscichlamydia salmonis and Candidatus Clavochlamydia salmonicola, causing mixed infections in wild brown trout (Salmo trutta). Environmental Microbiology, 14(8):2048-2057.

[img]Published Version (English)
PDF (Article in press) - Registered users only
6MB

Abstract

Gill disease in salmonids is characterized by a multifactorial aetiology. Epitheliocystis of the gill lamellae caused by obligate intracellular bacteria of the order Chlamydiales is one known factor; however, their diversity has greatly complicated analyses to establish a causal relationship. In addition, tracing infections to a potential environmental source is currently impossible. In this study, we address these questions by investigating a wild brown trout (Salmo trutta) population from seven different sites within a Swiss river system. One age class of fish was followed over 18 months. Epitheliocystis occurred in a site-specific pattern, associated with peak water temperatures during summer months. No evidence of a persistent infection was found within the brown trout population, implying an as yet unknown environmental source. For the first time, we detected 'Candidatus Piscichlamydia salmonis' and 'Candidatus Clavochlamydia salmonicola' infections in the same salmonid population, including dual infections within the same fish. These organisms are strongly implicated in gill disease of caged Atlantic salmon in Norway and Ireland. The absence of aquaculture production within this river system and the distance from the sea, suggests a freshwater origin for both these bacteria and offers new possibilities to explore their ecology free from aquaculture influences.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Surgical Pathology
05 Vetsuisse Faculty > Institute of Veterinary Pathology
DDC:570 Life sciences; biology
610 Medicine & health
Language:English
Date:2012
Deposited On:21 Jan 2012 11:46
Last Modified:29 Nov 2013 18:36
Publisher:Wiley-Blackwell
ISSN:1462-2912
Publisher DOI:10.1111/j.1462-2920.2011.02670.x
PubMed ID:22176683
Citations:Web of Science®. Times Cited: 5
Google Scholar™
Scopus®. Citation Count: 7

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page