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Publikationstyp: Zeitschriftenaufsatz
Dokumenttyp: Originalarbeit

Jahr: 2014

AutorInnen: Abd-Elfattah, A; Kumar, G; Soliman, H; El-Matbouli, M

Titel: Persistence of Tetracapsuloides bryosalmonae (Myxozoa) in chronically infected brown trout Salmo trutta.

Quelle: Dis Aquat Organ. 2014; 111(1):41-49



Autor/innen der Vetmeduni Vienna:

Abd-Elfattah Ahmed
El-Matbouli Mansour
Kumar Gokhlesh
Soliman Hatem

Beteiligte Vetmed-Organisationseinheiten
Universitätsklinik für Geflügel und Fische, Klinische Abteilung für Fischmedizin


Zugehörige(s) Projekt(e): Genexpression und -funktion von Tetracapsuloide bryosalmonae


Abstract:
Proliferative kidney disease (PKD) is a widespread disease of farmed and wild salmonid populations in Europe and North America, caused by the myxozoan parasite Tetracapsuloides bryosalmonae. Limited studies have been performed on the epidemiological role in spread of the disease played by fish that survive infection with T. bryosalmonae. The aim of the present study was to evaluate the persistence of T. bryosalmonae developmental stages in chronically infected brown trout Salmo trutta up to 2 yr after initial exposure to laboratory-infected colonies of the parasite"s alternate host, the bryozoan Fredericella sultana. Kidney, liver, spleen, intestine, brain, gills and blood were sampled 24, 52, 78 and 104 wk post-exposure (wpe) and tested for T. bryosalmonae by PCR and immunohistochemistry (IHC). Cohabitation trials with specific pathogen free (SPF) F. sultana colonies were conducted to test the viability of T. bryosalmonae. PCR detected T. bryosalmonae DNA in all tissue samples collected at the 4 time points. Developmental stages of T. bryosalmonae were demonstrated by IHC in most samples at the 4 time points. Cohabitation of SPF F. sultana with chronically infected brown trout resulted in successful transmission of T. bryosalmonae to the bryozoan. This study verified the persistence of T. bryosalmonae in chronically infected brown trout and their ability to infect the bryozoan F. sultana up to 104 wpe.

Keywords Pubmed: Animals
Chronic Disease
Fish Diseases/parasitology*
Immunohistochemistry/veterinary
Myxozoa/physiology*
Parasitic Diseases, Animal/parasitology*
Polymerase Chain Reaction/veterinary
Trout*


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