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Antilisterial efficacy of Lactobacillus bacteriocins and organic acids on frankfurters. Impact on sensory characteristics

Author:
Castellano, Patricia, Peña, Natalia, Ibarreche, MarianaPérez, Carduza, Fernando, Soteras, Trinidad, Vignolo, Graciela
Source:
Journal of food science and technology 2018 v.55 no.2 pp. 689-697
ISSN:
0022-1155
Subject:
Lactobacillus curvatus, Lactobacillus sakei, Listeria monocytogenes, antibacterial properties, color, consumer acceptance, dipping, flavor, hot dogs, juiciness, lactic acid, meat, nisin, pathogens, regrowth, vacuum packaging
Abstract:
Dipping solutions containing bacteriocins produced by Lactobacillus curvatus CRL705 and Lactobacillus sakei CRL1862 (Bact705/1862), nisin and organic acids (lactic acid, LA; acetic acid, AA) were tested alone or in combination against Listeria monocytogenes inoculated by immersion on vacuum-packaged frankfurters stored at 10 °C during 36 days. LA/AA solution (2.5% v/v each) reduced pathogen population by 1.50 log₁₀ CFU/ml during storage. Semi-purified Bact705/1862 prevented L. monocytogenes growth, while nisin was not able to avoid its regrowth after 20 days. The combined addition of Bact705/1862 + LA/AA was the most effective approach for pathogen reduction below detection level from day 6 to final storage. Frankfurters treated with Bact705/1862 + LA/AA compared to fresh-purchased samples did not show significant differences in flavor, juiciness, color intensity and overall preference at 22 days-storage at 5 °C. Meat processors should not only validate the antimicrobial efficacy of combined treatments but also their sensory impact on the product, which is directly related to consumer acceptability.
Agid:
5890245