Survival assessment of Salmonella enterica in inoculated pork salami

Authors

DOI:

https://doi.org/10.5433/1679-0359.2020v41n6p2613

Keywords:

Fermentation, Maturation, Microorganism, Ripening, Sausage.

Abstract

Pork salami is an embedded, cured and ripened product commonly consumed in Brazil, and the presence of Salmonella enterica has already been reported in this product. During its preparation, the microbiological safety depends on the meat quality, addition of ingredients with antimicrobial activity, hygiene during processing, pH and water activity (Aw) reduction during maturation. In Brazil, the maturation protocol has not been determined in food regulation; therefore, the objectives of this study were (a) to identify the fermentation and drying phases during salami maturation; (b) to test the survival of S. enterica during salami processing; and (c) to compare xylose lysine deoxycholate (XLD) and thin agar layer (TAL) agar for recovering Salmonella. The salami samples were prepared with a cocktail of S. enterica strains, fermented at 30°C and dried at 20°C with controlled relative humidity (RH). Periodic sampling for S. enterica quantification and Aw and pH analyses were performed during maturation, and curves were constructed. Fermentation occurred during the first 66 hours, and the pH decreased while the population of S. enterica increased over the first 21 hours. The drying step was able to reduce the bacterial population by approximately 5 log CFU after 875 hours, reaching an Aw of less than 0.78. However, elimination of S. enterica was not achieved. For Salmonella recovery, TAL agar was more efficient than XLD agar.

Author Biographies

Gabriela Orosco Werlang, Universidade Federal do Rio Grande do Sul

Dra, Laboratório de Medicina Veterinária Preventiva, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, RS, Brasil.

Tatiana Regina Vieira, Universidade Federal do Rio Grande do Sul

Discente do Curso de Doutorado do Programa de Pós-Graduação em Ciências Veterinárias, Faculdade de Veterinária, UFRGS, Porto Alegre, RS, Brasil.

Eduardo de Freitas Costa, Universidade Federal do Rio Grande do Sul

Pós-Doutor, Laboratório de Epidemiologia, Faculdade de Veterinária, UFRGS, Porto Alegre, RS, Brasil.

Marisa Cardoso, Universidade Federal do Rio Grande do Sul

Profª Drª, Departamento de Medicina Veterinária Preventiva, Faculdade de Veterinária, UFRGS, Porto Alegre, RS, Brasil.

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Published

2020-09-19

How to Cite

Werlang, G. O., Vieira, T. R., Costa, E. de F., & Cardoso, M. (2020). Survival assessment of Salmonella enterica in inoculated pork salami. Semina: Ciências Agrárias, 41(6), 2613–2620. https://doi.org/10.5433/1679-0359.2020v41n6p2613

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