Efficacy of propionic acid against Listeria monocytogenes attached to poultry skin during refrigerated storage |
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| Affiliation: | 1. Animal Biosciences and Biotechnology Laboratory, Beltsville Agricultural Research Center, USDA, ARS, Beltsville, MD 20705, USA;2. Department of Animal Science and Technology, Chung-Ang University, Anseong 456-756, South Korea;3. National Academy of Agricultural Science, Rural Development Administration, Wanju, Jeollabuk-do 565-851, South Korea;4. Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD 21201, USA;5. InVivo ANH, Talhouët, 56250 St. Nolff, France;1. Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore;2. Setsco Services Pte Ltd, 18 Teban Gardens Crescent, Singapore 608925, Singapore;3. National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China |
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| Abstract: | This work evaluates the effect of propionic acid dip on the growth of Listeria monocytogenes on poultry legs stored at 4 °C for 8 days.Fresh inoculated chicken legs were dipped into either 1% or 2% propionic acid solution (v/v) or distilled water (control). Changes in mesophiles, enterobacteriaceae counts and sensorial characteristics (odour, colour and overall appearance) were also evaluated.The shelf life of the samples washed with propionic acid was extended by at least 2 days over the control samples washed with distilled water. Legs washed with 2% propionic acid showed a significant (p < 0.05) inhibitory effect on L. monocytogenes compared to control legs, with a decrease of about 2.72 log units after 3 days of storage. Sensory quality was not adversely affected by propionic acid.This study demostrates that while propionic acid did reduce growth of L. monocytogenes on meat, it did not completely inactivate the pathogen. |
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| Keywords: | Poultry Decontamination Food safety Pathogen reduction Organic acids |
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