Optimization of UV-C light and lactic acid combined treatment in decontamination of sliced Brazilian dry-cured loin: Salmonella Typhimurium inactivation and physicochemical quality

Meat Sci. 2021 Feb:172:108308. doi: 10.1016/j.meatsci.2020.108308. Epub 2020 Sep 11.

Abstract

This study aimed to test the effect of UV-C light (0.01-0.64 J/cm2) (UV) and lactic acid (0.1-12.9%) (LA) combined treatment on sliced Brazilian dry-cured loin (Socol, BDL) for (i) Salmonella Typhimurium reduction, (ii) physicochemical changes (color (a*, cured color, and ΔE), protein and lipid oxidation) and (iii) optimization using response surface methodology (RSM). Linear inactivation rate was achieved and UV was 2-fold more efficient than LA to inactivate S. Typhimurium. At the same time these combined technologies increased lipid (linear rate, R2adj = 0.88), protein oxidation (quadratic rate, R2adj = 0.86) and meat discoloration. Furthermore, the minimum point of the physicochemical changes was obtained using RSM, and the decontamination process was optimized. Hence, a reduction of 1.3 log cfu/g was achieved using 0.36 J/cm2 of UV and 7.7% of LA. These combined methods represent a promising industrial intervention strategy to dry-meat safety and quality.

Keywords: Color quality; Mild processing; Non-thermal hurdle technology; Organic acid; Protein oxidation; Response surface methodology.

MeSH terms

  • Animals
  • Color
  • Decontamination / methods
  • Food Handling / methods
  • Food Microbiology
  • Lactic Acid / pharmacology*
  • Meat Products / analysis
  • Meat Products / microbiology*
  • Oxidation-Reduction / drug effects
  • Oxidation-Reduction / radiation effects
  • Salmonella typhimurium / drug effects*
  • Salmonella typhimurium / radiation effects*
  • Swine
  • Ultraviolet Rays*

Substances

  • Lactic Acid