4.3 Article

Effect of propionic acid on Campylobacter jejuni attached to chicken skin during refrigerated storage

Journal

INTERNATIONAL MICROBIOLOGY
Volume 18, Issue 3, Pages 171-175

Publisher

SPRINGER
DOI: 10.2436/20.1501.01.247

Keywords

Campylobacter jejuni; Pseudomonas spp.; poultry; meat safety; pathogen reduction

Funding

  1. Regional Government of La Rioja (Spain) [FOMENTA 2007-11]
  2. University of La Rioja (Spain) [PROFAI 13/24]

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The ability of propionic acid to reduce Campylobacter jejuni on chicken legs was evaluated. Chicken legs were inoculated with Campylobacter jejuni. After dipping legs in either water (control), 1% or 2% propionic acid solution (vol/ vol), they were stored at 4 degrees C for 8 days. Changes in C. jejuni, psychrotrophs and Pseudomonas counts were evaluated. Washing in 2% propionic acid significantly reduced (P < 0.05) C. jejuni counts compared to control legs, with a decrease of about 1.62 log units after treatment. Treatment of chicken legs with 1 or 2% propionic acid significantly reduced (P < 0.05) numbers of psychrotrophs 1.01 and 1.08 log units and Pseudomonas counts 0.75 and 0.96 log units, respectively, compared to control legs. The reduction in psychrotrophs and Pseudomonas increased throughout storage. The highest reductions obtained for psychrotrophs and Pseudomonas counts in treated legs were reached at the end of storage, day 8, being 3.3 and 2.93 log units, respectively, compared to control legs. Propionic acid treatment was effective in reducing psychrotrophs and Pseudomonas counts on chicken legs throughout storage. It is concluded that propionic acid is effective for reducing C. jejuni populations in chicken.

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