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Pulsed-field gel electrophoresis profiles of aeromonads isolated from healthy and diseased Helix aspersa from French snail farms

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Abstract:

The XbaI digestion patterns of chromosomal DNA of 42 aeromonads isolated from French breeding snails during a new epizootic disease, which rapidly progressed to death during the summer of 1994, were analyzed by pulsed-field gel electrophoresis. Biochemical identification to species level was also performed. Interestingly, we found that 76% of the aeromonads isolated from diseased snails clustered into a unique pulsotype (P1) whatever their geographic origin, and were assessed to belong to Aeromonas hydrophila. Other strains belonged to Aeromonas caviae or remained unspecified. Our results provide retrospective supplementary epidemiological evidence for implication of A. hydrophila strains in the snail summer disease.Key words: breeding snails, pulsed-field gel electrophoresis, Aeromonas.

L'ADN de 42 souches d'Aeromonas isolées d'escargots d'élevage français lors d'une épizootie estivale en 1994 a été analysé par la technique de l'électrophorèse en champ pulsé (PFGE). L'identification biochimique des différentes espèces a également été réalisée. Fait remarquable, 76 % des souches d'Aeromonas isolées d'escargots malades ont été identifiées à l'espèce Aeromonas hydrophila et appartenaient à un pulsotype unique (P1), quelle que soit leur origine géographique. D'autres souches appartenaient à Aeromonas caviae ou sont demeurées inconnues. La mise en évidence d'un pulsotype dominant apparenté à A. hydrophila vient étayer a posteriori l'hypothèse de l'implication des bactéries de ce groupe dans la survenue du « syndrome estival » chez les escargots.Mots clés : escargots d'élevage, électrophorèse en champ pulsé, Aeromonas.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: September 1, 2005

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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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