Genotypic and phenotypic correlationships among some strains ofLactobacillus
helveticus |
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| Authors: | M Grazia Fortina Carlo Parini Pier Luigi Manachini Lorenzo Morelli Vittorio Bottazzi Paola Concari |
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| Institution: | (1) Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche-Sezione Microbiologia Industriale, Università degli Studi di Milano, Facolta di Agraria, 20133 Milano, Italy;(2) Istituto di Microbiologia, Università Cattolica, Facoltà di Agraria, 29100 Piacenza, Italy |
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| Abstract: | Summary Evidence for the presence of extrachromosomal elements inLactobacillus
helveticus ATCC 15009 and the absence of plasmid DNA in two other strains ofL.
helveticus is reported. These three strains did not show any difference in regard to lactose metabolism, proteolytic activity, and antibiotic resistance or in N-acetyl-D-glucosamine fermentation. The only difference found is a higher resistance to arsenate forL.
helveticus ATCC 15009, suggesting linkage of this resistance to plasmids present in this strain. |
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