Sensitivity of Salmonella Typhimurium to nisin in vitro and in orange juice under refrigeration

Abstract The influence of environmental factors on Salmonella sensitivity to nisin in vitro and in refrigerated orange juice were investigated. Nisin activity was observed in the different conditions, but the highest efficiency was achieved at lower pH (4.0) and with higher bacteriocin concentration...

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Bibliographic Details
Published in:FEMS microbiology letters 2024-01, Vol.371
Main Authors: Fernandes da Silva, Carla Gabriela, Santos Lopes, Flávio, Cardoso Vieira Valois, Álissy Fernanda, Vieira Prudêncio, Cláudia
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - pharmacology
Citrus sinensis - chemistry
Citrus sinensis - microbiology
Food Microbiology
Food Preservation - methods
Fruit and Vegetable Juices - microbiology
Hydrogen-Ion Concentration
Microbial Sensitivity Tests
Nisin - pharmacology
Refrigeration
Salmonella typhimurium - drug effects
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Summary:Abstract The influence of environmental factors on Salmonella sensitivity to nisin in vitro and in refrigerated orange juice were investigated. Nisin activity was observed in the different conditions, but the highest efficiency was achieved at lower pH (4.0) and with higher bacteriocin concentration (174 µM). Moreover, the bactericidal action was directly proportional to the incubation period. When tested in orange juice, nisin caused a reduction of up to 4.05 logarithm cycles in the Salmonella population. So, environmental factors such as low pH and low temperature favored the sensitization of Salmonella cells to the bactericidal action of nisin. Therefore, this may represent an alternative to control Salmonella in refrigerated foods. Sensitivity of Salmonella Typhimurium to nisin.
ISSN:1574-6968
1574-6968
DOI:10.1093/femsle/fnae031