title: Production of bacteriocin-like substances by lactic acid bacteria isolated from regional ovine cheese.
abstract: Lactic acid bacteria (LAB) were isolated from ovine milk and cheeses manufactured in the South Region of Brazil. Among 112 bacterial isolates investigated, 59 were chosen through a screening for LAB. Among these 59 strains of LAB, 21% showed antimicrobial, proteolytic and lipolytic activities. Based on this screening, Lactobacillus plantarum LCN 17 and Lactobacillus rhamnosus LCN 43 were selected and tested for the production of bacteriocin-like substances (BLS). The BLS produced by both isolates showed antimicrobial activity against Listeria monocytogenes, whereas that produced by L. plantarum LCN 17 presented higher stability to different temperature, pH and enzyme treatments. These strains present potential for production of BLS, and for use as starter cultures.
authors.affiliation: Laboratório de Bioquímica e Microbiologia Aplicada, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul , Porto Alegre, RS , Brasil.
authors.forename: Cássia Regina
authors.initials: CR
authors.lastname: Nespolo
authors.forename: Adriano
authors.initials: A
authors.lastname: Brandelli
keywords: Brazilian ovine cheese; bacteriocin-like substances; ewe’s raw milk; lactic acid bacteria
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