Detection and characterization of potentially pathogenic Aeromonas sobria isolated from fish Hypophthalmichthys molitrix (Cypriniformes: Cyprinidae)

The current study focuses on the detection and characterization of potentially pathogenic Aeromonas sobria from fish silver carp (Hypophthalmichthys molitrix). Assessment of clinical, microbiological, pathological and biochemical characteristics of A. sobria were taken into account in order to under...

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Bibliographic Details
Published in:Microbial pathogenesis 2016-02, Vol.91, p.136-140
Main Authors: Dar, Gowhar H., Dar, Shoaib A., Kamili, Azra N., Chishti, Mohammad Z., Ahmad, Fayaz
Format: Article
Language:English
Subjects:
Aeromonas - classification
Aeromonas - genetics
Aeromonas - isolation & purification
Aeromonas - pathogenicity
Aeromonas sobria
Animals
Carps - microbiology
Cyprinidae
Cypriniformes
Exotic carp
Fish Diseases - microbiology
Gram-Negative Bacterial Infections - microbiology
Gram-Negative Bacterial Infections - veterinary
Hypophthalmichthys molitrix
Virulence
VITEK-2 system
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Summary:The current study focuses on the detection and characterization of potentially pathogenic Aeromonas sobria from fish silver carp (Hypophthalmichthys molitrix). Assessment of clinical, microbiological, pathological and biochemical characteristics of A. sobria were taken into account in order to understand the epidemiology, frequency and occurrence of this infection. Clinically the infected fish (H. molitrix) was observed for various types of symptoms. A total of 33 colonies of A. sobria strain were isolated from 20 cultured H. molitrix, collected from controlled fish pond. Microscopic examination revealed that the strains were rod-shaped, Gram negative bacteria. The revealed percent probability identification of A. sobria from the biochemical characterization in VITEK system was 93% with gram negative (GN) card. The histopathology of Gills caused by this bacterium, A. sobria indicate haemorrhagic gill epithelia and epithelial hyperplasia. Lamelar epithelial hypertrophy and hyperplasia with degenerative changes of the epithelium and hypertrophic epitheliocystis infected cells on gills of H. molitrix were observed during the present study.
ISSN:0882-4010
1096-1208
DOI:10.1016/j.micpath.2015.10.017