First isolation of Vibrio tapetis and an atypical strain of Aeromonas salmonicida from skin ulcerations in common dab (Limanda limanda) in the North Sea

Skin ulcerations rank amongst the most prevalent lesions affecting wild common dab (Limanda limanda) with an increase in prevalence of up to 3.5% in the Belgian part of the North Sea. A complex aetiology of these ulcerations is suspected, and many questions remain on the exact factors contributing t...

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Bibliographic Details
Published in:Journal of Fish Diseases
Main Authors: Vercauteren, Maaike, De Swaef, Evelien, Declercq, Annelies, Bosseler, Leslie, Gulla, Snorre, Balboa, Sabela, Romalde, Jesus L, Devriese, Lisa, Polet, Hans, Boyen, Filip, Chiers, Koen, Decostere, Annemie
Format: Article in Journal/Newspaper
Language:English
Published: 2018
Subjects:
Veterinary Sciences
Biology and Life Sciences
Aeromonas salmonicida
A-layer
common dab (Limanda limanda)
North Sea
Skin ulcerations
Vibrio tapetis
FLOUNDER PLATICHTHYS-FLESUS
DUTCH WADDEN SEA
BALTIC SEA
GADUS-MORHUA
FISH
DISEASE
SURFACE
ULCERS
SOLE
TRANSMISSION
Gadus morhua
Online Access:https://biblio.ugent.be/publication/8543444
http://hdl.handle.net/1854/LU-8543444
https://doi.org/10.1111/jfd.12729
https://biblio.ugent.be/publication/8543444/file/8559524
Description
Summary:Skin ulcerations rank amongst the most prevalent lesions affecting wild common dab (Limanda limanda) with an increase in prevalence of up to 3.5% in the Belgian part of the North Sea. A complex aetiology of these ulcerations is suspected, and many questions remain on the exact factors contributing to these lesions. To construct the aetiological spectrum of skin ulcerations in flatfish, a one-day monitoring campaign was undertaken in the North Sea. Fifteen fish presented with one or more ulcerations on the pigmented and/or non-pigmented side. Pathological features revealed various stages of ulcerations with loss of epidermal and dermal tissue, inflammatory infiltrates and degeneration of the myofibers bordering the ulceration, albeit in varying degrees. Upon bacteriological examination, pure cultures of Vibrio tapetis were retrieved in high numbers from five fish and of Aeromonas salmonicida in one fish. The V.tapetis isolates showed cross-reactivity with the sera against the representative strain of serotype O2 originating form a carpet-shell clam (Ruditapes descussatus). Moreover, the A.salmonicida isolates displayed a previously undescribed vapA gene sequence (A-layer type) with possible specificity towards common dab. Further research is necessary to pinpoint the exact role of these agents in the development of skin ulcerations in common dab.

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