Title
Selection of indigenous lactic acid bacteria presenting anti-listerial activity, and their role in reducing the maturation period and assuring the safety of traditional Brazilian cheeses
Date Issued
01 August 2018
Access level
open access
Resource Type
journal article
Author(s)
Campagnollo F.
Margalho L.
Kamimura B.
Feliciano M.
Freire L.
Lopes L.
Alvarenga V.
Cadavez V.
Schaffner D.
Sant'Ana A.
Instituto Politécnico de Bragança
Publisher(s)
Academic Press
Abstract
Artisanal raw milk cheeses are highly appreciated dairy products in Brazil and ensuring their microbiological safety has been a great need. This study reports the isolation and characterization of lactic acid bacteria (LAB) strains with anti-listerial activity, and their effects on Listeria monocytogenes during refrigerated shelf-life of soft Minas cheese and ripening of semi-hard Minas cheese. LAB strains (n = 891) isolated from Minas artisanal cheeses (n = 244) were assessed for anti-listerial activity by deferred antagonism assay at 37 °C and 7 °C. The treatments comprised the production of soft or semi-hard Minas cheeses using raw or pasteurized milk, and including the addition of selected LAB only [Lactobacillus brevis 2-392, Lactobacillus plantarum 1-399 and 4 Enterococcus faecalis (1-37, 2-49, 2-388 and 1-400)], L. monocytogenes only, selected LAB co-inoculated with L. monocytogenes, or without any added cultures. At 37 °C, 48.1% of LAB isolates showed anti-listerial capacity and 77.5% maintained activity at 7 °C. Selected LAB strains presented a bacteriostatic effect on L. monocytogenes in soft cheese. L. monocytogenes was inactivated during the ripening of semi-hard cheeses by the mix of LAB added. Times to attain a 4 log-reduction of L. monocytogenes were 15 and 21 days for semi-hard cheeses produced with raw and pasteurized milk, respectively. LAB with anti-listerial activity isolated from artisanal Minas cheeses can comprise an additional barrier to L. monocytogenes growth during the refrigerated storage of soft cheese and help shorten the ripening period of semi-hard cheeses aged at ambient temperature.
Start page
288
End page
297
Volume
73
Language
English
OCDE Knowledge area
Biología celular, Microbiología Ciencia animal, Ciencia de productos lácteos
Scopus EID
2-s2.0-85042195114
PubMed ID
Source
Food Microbiology
ISSN of the container
07400020
Sponsor(s)
The authors thank the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for financial support (Grants 13/20456-9 , 14/14891-7 , 15/25641-4 , 16/21041-5 , 16/12406-0 and 16/09346-5 ). Dr. Gonzales-Barron also acknowledges the financial support provided by the Portuguese Foundation for Science and Technology (FCT) through the award of an Investigator Fellowship (IF) in the mode of Development Grants ( IF/00570 ). A.S. Sant'Ana acknowledges the financial support of “ Conselho Nacional de Desenvolvimento Científico e Tecnológico” (CNPq) (Grant # 302763/2014-7 ) and CAPES (Grant # 33003017027P1 ).
Sources of information: Directorio de Producción Científica Scopus