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Appl. Environ. Microbiol., Apr 1996, 1178-1181, Vol 62, No. 4
HMLJ Joosten and M Nunez
The susceptibility of 13 amine-forming lactobacilli to several bacteriocins
was investigated by an agar diffusion assay. All strains were susceptible
to nisin and to five bacteriocins of enterococcal origin. Pediocin PA-1,
bavaricin A, lactococcin A, and a bacteriocin from Enterococcus faecalis
1061 did not show inhibitory activity. Two bacteriocin-producing
enterococci and a nisin-producing Lactococcus lactis strain were employed
as starters in separate cheese-making experiments. Outgrowth of histamine
producer Lactobacillus buchneri St2A, which was added to the milk at levels
of up to 190 CFU/ml, was almost completely inhibited. No histamine
formation was detected in the cheeses made with bacteriocin-producing
starters. In the control cheese without bacteriocin, St2A reached levels of
1.1 x 10(sup8) CFU/g, and 200 mg of histamine per kg was found after 4
months of ripening. To our knowledge, this is the first report of
bacteriocin-mediated inhibition of histamine formation in foods.
Copyright © 1996, American Society for Microbiology
Prevention of Histamine Formation in Cheese by Bacteriocin-Producing Lactic Acid Bacteria
Departamento de Tecnologia de Alimentos, CIT-INIA, 28040 Madrid, Spain
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