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Evaluation of Probiotic Characteristics of Lactic Acid Bacteria Isolated from Artisan Cheese
Author(s) -
Hermanns Gislaine,
Funck Graciele Daiana,
Schmidt Jéssica Tamiozzo,
Pereira Jamile Queiroz,
Brandelli Adriano,
Richards Neila Silvia Pereira dos Santos
Publication year - 2014
Publication title -
journal of food safety
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 43
eISSN - 1745-4565
pISSN - 0149-6085
DOI - 10.1111/jfs.12138
Subject(s) - probiotic , bacteria , lactic acid , antimicrobial , microbiology and biotechnology , virulence , biology , food science , hemolysin , antibiotics , biochemistry , genetics , gene
The objective of this study was to identify and to evaluate probiotic characteristics and possible virulence factors of lactic acid bacteria ( LAB ) isolated from artisan cheeses from the northwestern region of R io G rande do S ul ( RS ) state, south of B razil. Among the isolated LAB , six strains showing broader antimicrobial activity were identified by polymerase chain reaction amplification and sequencing of 16 S rDNA and ribosomal 16 S ‐23 S intergenic spacer region. The results showed most isolates were E nterococcus faecium ( n = 4) and the other strains were E nterococcus faecalis and L actobacillus plantarum . These isolates showed tolerance to acidic conditions and bile salts, and to simulated gastrointestinal juices. Isolates were also evaluated for susceptibility to antimicrobials and production of β ‐hemolysin as indicators of virulence. Hemolysin was negative for all isolates, but only E . faecium strains were susceptible to all antibiotics tested. Practical Applications Artisan cheeses can be an interesting source for autochthonous bacteria for food use. The selected lactic acid bacteria showing antimicrobial activity on pathogenic bacteria have potential health benefits to the dairy industry. Some E nterococcus species isolated in this study showed desirable properties as potential probiotic strains, which can contribute for their use in food and feed industry.