Bacteria recovered from diseased cultured gilthead sea bream (Sparus aurata L.) in southwestern Spain
2003
Zorrilla, I. | Chabrillon, M. | Arijo, S. | Diaz-Rosales, P. | Martinez-Manzanares, E. | Balebona, M.C. | Morinigo, M.A.
A bacteriological study of 25 outbreaks affecting cultured gilthead sea bream (Sparus aurata L.) in southwestern Spain from 1997 to 2000 has been carried out. Each year, the highest number of outbreaks occurred during winter and affected fish with sizes ranging between 2 and 25 g. The most frequently isolated microorganisms were identified as Vibrio (69.90%). Other microorganisms belonging to Pseudomonas spp., Photobacterium damselae ssp. piscicida, Cytophaga/Flexibacter-like and Aeromonas spp. were isolated with a frequency lower than 10%. The outbreaks with the highest mortalities of cultured gilthead sea bream were due to P. damselae ssp. piscicida. An increase in the number of resistances to different antimicrobials has been observed in this study with respect to previous studies carried out in the same area. This increase was very high in the case of some species of Vibrio, Pseudomonas spp. and P. damselae ssp. piscicida.
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