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Antimicrobial activity of cetylpyridinium chloride against Listeria monocytogenes on frankfurters and subsequent effect on quality attributes.

Author(s) : SINGH M., GILL V. S., THIPPAREDDI H., et al.

Type of article: Article

Summary

Frankfurters inoculated with Listeria monocytogenes were treated with 1% cetylpyridinium chloride (CPC) or with 1% CPC followed by a water rinse at various combinations of spray temperatures (25, 40, and 55°C), spray pressures (20, 25, and 35 psi), and times of exposure (30, 40, and 60 s.). No significant differences were observed in the reductions achieved by 1% CPC + water wash and those achieved with 1% CPC treatment alone. L. monocytogenes populations were reduced by ca. 1.7 log CFU/g immediately following treatment, with no differences observed for different spray temperatures, pressures, or exposure times. The effectiveness of 1% CPC spray treatment (at 25°C, 20 psi, and 30 s. of exposure) against L. monocytogenes on vacuum-packaged frankfurters stored at 0 and 4°C for 42 days was then evaluated. Application of a 1% CPC surface spray to frankfurters immediately prior to packaging reduced L. monocytogenes concentrations by 1.4 to 1.7 log CFU/g and further restricted growth of the pathogen during 42 days of refrigerated storage, thereby meeting US Department of Agriculture alternatives 1 and 2 criteria for Listeria control. CPC treatment reduced aerobic plate counts, lactic acid bacteria, yeasts and moulds, total coliforms, and Escherichia coli populations on noninoculated frankfurters to below detectable limits. The 1% CPC treatment did not affect the colour of frankfurters stored for 42 days at 0 or 4°C. The effect of 1% CPC treatment on the firmness of frankfurters was also negligible.

Details

  • Original title: Antimicrobial activity of cetylpyridinium chloride against Listeria monocytogenes on frankfurters and subsequent effect on quality attributes.
  • Record ID : 2006-1857
  • Languages: English
  • Source: Journal of Food Protection - vol. 68 - n. 9
  • Publication date: 2005/09

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