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Occurrence of both subspecies of Photobacterium damselae in mullets collected in the river Magra (Italy)

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Abstract:

The natural reservoirs and biological characteristics of pathogenic populations of both subspecies of Photobacterium damselae in aquatic habitants remain unclear because of difficulties in obtaining pathogenic strains from the environment. In the present study, we assessed the occurrence of Photobacterium damselae subsp. piscicida and Photobacterium damselae subsp. damselae, considered to be the causative agent of past epizootic outbreaks in mullets collected in the river Magra, Italy. Two hundred and seventy-eight mullets were collected during a period of two years (2008–2009) and analyzed using multiplex PCR. During this period, 57% of fishes were positive for Photobacterium damselae subsp. piscicida and 37% for Photobacterium damselae subsp. damselae, with an higher presence in summer months although none of PCR-positive mullets showed clinical signs of disease. Our results indicate that the two microrganisms are widespread in the population of mullets studied, and this could be a possible cause for outbreaks in favourable environmental conditions.

Keywords: PCR; Photobacterium damselae subsp. damselae; Photobacterium damselae subsp. piscicida; Photobacteriun damselae subsp. piscicida; meunier noir; monitoring; mullet; suivi

Document Type: Research Article

DOI: https://doi.org/10.1139/w11-021

Affiliations: 1: Marine Microbiology Laboratory of the Experimental Zooprophylactic Institute of Piemonte Liguria e Valle d’Aosta, La┬áSpezia, Italy. 2: Ittiopathology Laboratory of the Experimental Zooprophylactic Institute of Piemonte Liguria e Valle d’Aosta, Turin, Italy.

Publication date: 2011-05-21

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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