Epitheliocystis in Atlantic salmon, Salmo salar L., farmed in fresh water in Ireland is associated with 'Candidatus Clavochlamydia salmonicola' infection

Intracellular inclusions containing chlamydia-like organisms are frequently observed in the gill epithelial cells of Atlantic salmon, Salmo salar L., cultured in fresh water in Ireland. In this study, the causative agent was identified in four separate freshwater sites, using 16s rRNA sequencing, as...

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Bibliographic Details
Published in:Journal of Fish Diseases
Main Authors: HOLLAND, C., Steinum, Terje Marken, RODGER, H., FALK, K., COLQUHOUN, D. J., MITCHELL, S. O.
Other Authors: Vet Aqua Int ,, 100540
Format: Article in Journal/Newspaper
Language:English
Published: 2010
Subjects:
Ziraat
Toprak ve Bitki Besleme
Toprak ve Su Muhafazası ve Amenajmanı
Su Hasadı
Su Ürünleri
Sağlık Bilimleri
Veteriner Bilimleri
Tarımsal Bilimler
VETERİNERLİK BİLİMLERİ
DENİZ VE TATLISU BİYOLOJİSİ
Tarım ve Çevre Bilimleri (AGE)
Bitki ve Hayvan Bilimleri
BALIKÇILIK
Atlantic salmon
Salmo salar
Online Access:https://hdl.handle.net/20.500.12627/44684
https://doi.org/10.1111/j.1365-2761.2010.01171.x
Description
Summary:Intracellular inclusions containing chlamydia-like organisms are frequently observed in the gill epithelial cells of Atlantic salmon, Salmo salar L., cultured in fresh water in Ireland. In this study, the causative agent was identified in four separate freshwater sites, using 16s rRNA sequencing, as 'Candidatus Clavochlamydia salmonicola'. Histopathology and real-time (RT) PCR were used to further assess infections. The prevalence of infection ranged from 75-100% between sites and infection intensity was highly variable. No significant lesions were associated with these infections. As a diagnostic tool, RT-PCR proved marginally more sensitive than histopathology. The fate of 'Candidatus Clavochlamydia salmonicola' in Atlantic salmon post-seawater transfer was investigated in a 12-week marine longitudinal study. Both RT-PCR and histopathological examination indicate that the organism disappears from the gills 4-6 weeks post-transfer.

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