High potential of adhesion to abiotic and biotic materials in fish aquaculture facility by Vibrio alginolyticus strains.
OBJECTIVE
The ability of Vibrio alginolyticus strains isolated from Sparus aurata and Dicentrarchus labrax nursery to adhere to epithelial cell lines (Hep-2 and Caco-2), fish mucus and their ability to form a biofilm on different surfaces (glass, polystyrene, polyethylene and polyvinyl-chloride) was investigated in this study.


RESULTS
The extracellular products were rich in enzymes and the strains were haemolytic on Wagatsuma agar and possessed several hydrolytic exoenzymes such as proteases, DNase and lipases. Most strains tested were multiresistant to the 17 antibiotics tested including those used in the farm to treat vibriosis.


CONCLUSIONS
These bacteria were able to form a biofilm on all the surfaces tested and the cell density was the highest on the PVC surface followed by that on the glass slides, polystyrene and the polyethylene surface. More than 50% of the tested strains were adhesive to the epithelial cell lines (Hep-2 and Caco-2).


CONCLUSIONS
These properties allow these bacteria to survive, proliferate and persist in all stages of fish rearing nursery even after seawater treatment with UV light.
Snoussi
M
M
Laboratoire d'Analyse, Traitement et Valorisation des Polluants de l'Environnement et des Produits, Department of Microbiology, Faculty of Pharmacy, Rue Avicenne, Monastir, Tunisia. snmejdi@yahoo.fr
Noumi
E
E
Hajlaoui
H
H
Usai
D
D
Sechi
L A
LA
Zanetti
S
S
Bakhrouf
A
A
D000818:Animals; D017756:Aquaculture; D001422:Bacterial Adhesion; D001492:Bass; D018441:Biofilms / Q000254:growth & development; D018938:Caco-2 Cells / Q000382:microbiology; D045744:Cell Line, Tumor; D004587:Electrophoresis, Agar Gel; D004847:Epithelial Cells / Q000382:microbiology; D005898:Glass; D006801:Humans; D018625:Microscopy, Atomic Force; D009093:Mucus / Q000382:microbiology; D020959:Polyethylene; D011137:Polystyrenes; D021541:Sea Bream; D012623:Seawater; D044149:Vibrio alginolyticus / Q000145:classification / Q000235:genetics / Q000502:physiology*
D011137:Polystyrenes; D020959:Polyethylene