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

Author:

Fernandes da Silva Carla Gabriela1ORCID,Santos Lopes Flávio2ORCID,Cardoso Vieira Valois Álissy Fernanda1ORCID,Vieira Prudêncio Cláudia1ORCID

Affiliation:

1. Centro das Ciências Biológicas e da Saúde, Universidade Federal do Oeste da Bahia , Barreiras, 47810-047, Bahia , Brazil

2. Frutificar Cerrado , Barreiras, 47806-456, Bahia , Brazil

Abstract

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.

Funder

National Council for Scientific and Technological Development

Publisher

Oxford University Press (OUP)

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