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Int. microbiol ; 13(4): 189-193, dic. 2010.
Artigo em Inglês | IBECS | ID: ibc-96707

RESUMO

This study evaluates the utilization of lactose (Lac) and the presence of the phospho-β-galactosidase (lacG) gene as markers for distinguishing between fish (Lac-/lacG-) and dairy isolates (Lac+/lacG+) of Lactococcus garvieae, using a panel of L. garvieae isolates from different sources. None of the fish isolates produced acid from lactose (Lac-), however Lac-/lacG- isolates were observed in pigs, cows, birds and humans. Most of the dairy isolates (77.8%) were Lac+/lacG+, but some dairy isolates did not produce acid from this sugar. Data in the present study show that the ability to metabolize lactose and the presence of the lacG gene are heterogeneously scattered among L. garvieae isolates of different sources. Therefore, the use of these criteria as markers to differentiate between L. garvieae isolates of dairy and fish origin should be considered with caution (AU)


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Assuntos
Humanos , Animais , Bovinos , Laticínios/microbiologia , Peixes/microbiologia , Lactococcus/genética , Lactococcus/isolamento & purificação , Lactose/metabolismo , beta-Galactosidase/genética , Bacteriemia/microbiologia , Bacteriúria/microbiologia , Água Doce/microbiologia , Águas Residuárias/microbiologia , Pele/microbiologia
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