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Phenotypic and genetic diversity of Vibrio alginolyticus strains recovered from juveniles and older Sparus aurata reared in a Tunisian marine farm

Snoussi, Mejdi and Hajlaoui, Hafedh and Noumi, Emira and Zanetti, Stefania Anna Lucia and Bakhrouf, Amina (2008) Phenotypic and genetic diversity of Vibrio alginolyticus strains recovered from juveniles and older Sparus aurata reared in a Tunisian marine farm. Annals of Microbiology, Vol. 58 (1), p. 141-146. ISSN 1590-4261. Article.

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DOI: 10.1007/BF03179458

Abstract

This study characterises 43 Vibrio alginolyticus strains associated with diseased juveniles and older fish of Sparus aurata reared in a marine hatchery installed along the seacoasts of Monastir (Centre of Tunisia). Vibrio alginolyticus strains were isolated using the TCBS modified agar plates and the biochemical activities were tested using the API 20 E strips. The exoenzymes production and antibiotics susceptibility were also investigated. The ERIC-PCR was used to evaluate the genetic diversity of these strains. Vibrio alginolyticus was isolated from seawater (n = 16), juveniles with white nodular skin lesions (n = 9) and from all the internal organs of the older fish presenting a large and deep lesions in the muscle and with a necrotic eyes (n = 18). Most of the studied V. alginolyticus strains were β-haemolytic, hydrolyze the DNA and produce many exoenzymes such as lecithinase, caseinase, amylase and lipase. All tested strains were resistant to at least three antimicrobial agents. The ERIC-PCR profiles among the isolated bacteria were generally heterogeneous, showing a high polymorphism and suggesting independent circulation with some evidence of cross-transmission.

Item Type:Article
ID Code:2849
Status:Published
Refereed:Yes
Uncontrolled Keywords:Vibrio alginolyticus, exoenzymes, antibiotic susceptibility, ERIC-PCR
Subjects:Area 06 - Scienze mediche > MED/07 Microbiologia e microbiologia clinica
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
Publisher:University of Milan, Department of Food Science and Microbiology
ISSN:1590-4261
Deposited On:27 Aug 2009 10:56

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