Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/100846
Type: Artigo de periódico
Title: Detection And Characterization Of Bacteriocin-producing Lactococcus Lactis Strains
Author: Moreno I.
Lerayer A.L.S.
De Freitas Leitao M.F.
Abstract: One hundred sixty seven strains of Lactococcus lactis were screened for bacteriocin production by well diffusion assay of GM17 agar. Fourteen (8.4%) produced antimicrobial activity other than organic acids, bacteriophages or hydrogen peroxide. The frequency of bacteriocin production ranged from 2% in L. lactis subsp. cremoris up to 12% in L. lactis subsp. lactis. Antimicrobial activities were not observed in any strain of L. lactis subsp. lactis var. diacetylactis. Among thirteen bacteriocin-producing strains and two nisin- producing strains (L. lactis subsp. lactis ATCC 11454 and L. lactis subsp. lactis CNRZ 150), eight (53%) were characterized as lactose-positive (Lac +) and proteinase-negative (Prt -). The bacteriocin-producing cultures were also characterized on the basis of plasmid content. All strains had 2 to 7 plasmids with molecular weights varying from 0.5 to 28.1 Mdal. Four strains (ITAL 435, ITAL 436, ITAL 437 and ITAL 438) showed identical profiles and the other were quite distinct.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0032720116&partnerID=40&md5=354c3b3c5b81308a148ea49d313ca4f2
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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