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Utilization of lactose and presence of the phospho-β-galactosidase (lacG) gene in Lactococcus garvieae isolates from different sources

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Aguado Urda, Mónica and Cutuli Simón, M Teresa and Blanco Gutiérrez, M Mar and Aspiroz, Carmen and Tejedor, José L and Fernández Garayzábal, José F and Gibello Prieto, Alicia (2010) Utilization of lactose and presence of the phospho-β-galactosidase (lacG) gene in Lactococcus garvieae isolates from different sources. International microbiology: the official journal of the Spanish Society for Microbiology, 13 (4). pp. 189-93. ISSN 1618-1905

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Official URL: http://revistes.iec.cat/index.php/IM/article/view/53874



Abstract

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.


Item Type:Article
Uncontrolled Keywords:Lactococcus garvieae, lactose metabolism, lacG gen
Subjects:Medical sciences > Veterinary
ID Code:39683
Deposited On:22 Dec 2016 09:38
Last Modified:22 Dec 2016 09:38

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