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Foods 2014, 3(3), 527-540; doi:10.3390/foods3030527

Efficacy of Acetic Acid against Listeria monocytogenes Attached to Poultry Skin during Refrigerated Storage

Food Technology Department, CIVA Research Center, University of La Rioja, Madre de Dios 51, 26006 Logroño, La Rioja, Spain
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Received: 23 May 2014 / Revised: 7 July 2014 / Accepted: 6 August 2014 / Published: 11 September 2014
(This article belongs to the Special Issue Microbiology Safety of Meat Products)
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Abstract

This work evaluates the effect of acetic acid dipping on the growth of L. monocytogenes on poultry legs stored at 4 °C for eight days. Fresh inoculated chicken legs were dipped into either a 1% or 2% acetic acid solution (v/v) or distilled water (control). Changes in mesophiles, psychrotrophs, Enterobacteriaceae counts and sensorial characteristics (odor, color, texture and overall appearance) were also evaluated. The shelf life of the samples washed with acetic acid was extended by at least two days over the control samples washed with distilled water. L. monocytogenes counts before decontamination were 5.57 log UFC/g, and after treatment with 2% acetic acid (Day 0), L. monocytogenes counts were 4.47 log UFC/g. Legs washed with 2% acetic acid showed a significant (p < 0.05) inhibitory effect on L. monocytogenes compared to control legs, with a decrease of about 1.31 log units after eight days of storage. Sensory quality was not adversely affected by acetic acid. This study demonstrates that while acetic acid did reduce populations of L. monocytogenes on meat, it did not completely inactivate the pathogen. The application of acetic acid may be used as an additional hurdle contributing to extend the shelf life of raw poultry and reducing populations of L. monocytogenes. View Full-Text
Keywords: poultry; decontamination; meat safety; carcass; pathogen reduction; organic acids; Listeria monocytogenes poultry; decontamination; meat safety; carcass; pathogen reduction; organic acids; Listeria monocytogenes
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MDPI and ACS Style

Gonzalez-Fandos, E.; Herrera, B. Efficacy of Acetic Acid against Listeria monocytogenes Attached to Poultry Skin during Refrigerated Storage. Foods 2014, 3, 527-540.

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