title: Application of bacteriocinogenic Enterococcus mundtii CRL35 and Enterococcus faecium ST88Ch in the control of Listeria monocytogenes in fresh Minas cheese.
abstract: Several strains of Enterococcus spp. are capable of producing bacteriocins with antimicrobial activity against important bacterial pathogens in dairy products. In this study, the bacteriocins produced by two Enterococcus strains (Enterococcus mundtii CRL35 and Enterococcus faecium ST88Ch), isolated from cheeses, were characterized and tested for their capability to control growth of Listeria monocytogenes 426 in experimentally contaminated fresh Minas cheese during refrigerated storage. Both strains were active against a variety of pathogenic and non-pathogenic microorganisms and bacteriocin absorption to various L. monocytogenes, Enterococcus faecalis ATCC 19443 and Lactobacillus sakei ATCC 15521 varied according to the strain and the testing conditions (pH, temperature, presence of salts and surfactants). Growth of L. monocytogenes 426 was inhibited in cheeses containing E. mundtii CRL35 up to 12 days at 8 °C, evidencing a bacteriostatic effect. E. faecium ST88Ch was less effective, as the bacteriostatic affect occurred only after 6 days at 8 °C. In cheeses containing nisin (12.5 mg/kg), less than one log reduction was observed. This research underlines the potential application of E. mundtii CRL35 in the control of L. monocytogenes in Minas cheese.
authors: Universidade de São Paulo, Departamento de Alimentos e Nutrição Experimental, Laboratório de Microbiologia de Alimentos, Av. Prof. Lineu Prestes 580 Bl 14, 05508-000 São Paulo, SP, Brazil. estebanverapingitore@gmail.com
authors: Esteban
authors: E
authors: Vera Pingitore
authors: Svetoslav Dimitrov
authors: SD
authors: Todorov
authors: Fernando
authors: F
authors: Sesma
authors: Bernadette Dora Gombossy de Melo
authors: BD
authors: Franco
mesh_terms: D001430:Bacteriocins / Q000378:metabolism* / Q000494:pharmacology; D002611:Cheese / Q000382:microbiology*; D016983:Enterococcus / Q000737:chemistry / Q000378:metabolism*; D016984:Enterococcus faecium / Q000737:chemistry / Q000378:metabolism*; D005516:Food Microbiology; D005519:Food Preservation / Q000379:methods*; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development*
chemical_list: D001430:Bacteriocins