Short-time treatment with alkali and/or hot water to remove common pathogenic and spoilage bacteria from chicken wing skin

Ana Maria Rodriguez De Ledesma, Hans P. Riemann, Thomas B Farver

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Dipping in 10% trisodium phosphate (TSP) at 10°C for 15 s and/or hot water (95°C) for 5 s significantly (P < 0.05) reduced the numbers of live Salmonella typhimurium. Listeria monocytogenes, and Staphylococcus aureus inoculated on the surface of chicken wings. Mean reductions after treatment with TSP (after storage at 10°C or 4°C, respectively) were 93.45% and 62.42% for S. typhimurium. 80.33% and 54.45% for S. aureus, and 39.04% and 81.41% for L. monocytogenes. Similarly treatment with hot water resulted in reductions of 83.5% and 47.44%, 90.19% and 91.49%, and 68.57% and 77.83%, respectively, for the three bacterial species. The combined effects of TSP and hot water were 94.76% and 99.67%. 84.41% and 96.68%, and 79.49% and 94.88%. After treatment with TSP, there was always a better recovery of L. monocytogenes when the wings were stored at 10°C compared to 4°C. No similar storage temperature effect on recovery of L. monocytogenes was observed in the absence of TSP. Based on the smell and appearance of uninoculated, fresh chicken wings after treatment with 10% solutions of TSP or Na2CO3 (10°C) and hot water, the control group was always preferred after 1 day of storage, but not after 6 days of storage. Combination treatment with TSP and hot water showed that after 7 days of storage the number of' spoilage organisms was 3 log units higher on the control samples than on the treated wings. The combined TSP and hot water treatments were more effective in reducing counts of S. typhimurium. S. aureus, and L. monocytogenes than the combined Na2CO3 and hot water treatment (95°C for 5 s). Changes in subcutaneous temperature as a result of treatment with TSP and hot water treatment were minimal.

Original languageEnglish (US)
Pages (from-to)746-750
Number of pages5
JournalJournal of Food Protection
Issue number7
StatePublished - 1996


  • alkali
  • chicken skin
  • poultry
  • S. typhimurium
  • Trisodium phosphate

ASJC Scopus subject areas

  • Food Science
  • Biotechnology
  • Applied Microbiology and Biotechnology


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