Developing a two-step heat treatment for inactivating desiccation-adapted Salmonella spp. in aged chicken litter.

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  • Author(s): Chen Z;Chen Z; Wang H; Jiang X
  • Source:
    Foodborne pathogens and disease [Foodborne Pathog Dis] 2015 Feb; Vol. 12 (2), pp. 104-9. Date of Electronic Publication: 2014 Nov 18.
  • Publication Type:
    Comparative Study; Evaluation Study; Journal Article; Research Support, Non-U.S. Gov't
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Mary Ann Liebert, Inc Country of Publication: United States NLM ID: 101120121 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1556-7125 (Electronic) Linking ISSN: 15353141 NLM ISO Abbreviation: Foodborne Pathog Dis Subsets: MEDLINE
    • Publication Information:
      Original Publication: Larchmont, NY : Mary Ann Liebert, Inc., c2004-
    • Subject Terms:
      Adaptation, Physiological* ; Soil Microbiology*; Animal Husbandry/*methods ; Disinfection/*methods ; Industrial Waste/*analysis ; Salmonella/*growth & development ; Soil/*chemistry; Ammonia/analysis ; Animal Husbandry/economics ; Animals ; Bacterial Load ; California ; Chickens ; Hot Temperature ; Industrial Waste/economics ; Microbial Viability ; Organic Agriculture/economics ; Salmonella/physiology ; Water/analysis
    • Abstract:
      The effectiveness of a two-step heat treatment for eliminating desiccation-adapted Salmonella spp. in aged chicken litter was evaluated. The aged chicken litter with 20, 30, 40, and 50% moisture contents was inoculated with a mixture of four Salmonella serotypes for a 24-h adaptation. Afterwards, the inoculated chicken litter was added into the chicken litter with the adjusted moisture content for a 1-h moist-heat treatment at 65 °C and 100% relative humidity inside a water bath, followed by a dry-heat treatment in a convection oven at 85 °C for 1 h to the desired moisture level (<10-12%). After moist-heat treatment, the populations of Salmonella in aged chicken litter at 20 and 30% moisture contents declined from ≈6.70 log colony-forming units (CFU)/g to 3.31 and 3.00 log CFU/g, respectively. After subsequent 1-h dry-heat treatment, the populations further decreased to 2.97 and 2.57 log CFU/g, respectively. Salmonella cells in chicken litter with 40% and 50% moisture contents were only detectable by enrichment after 40 and 20 min of moist-heat treatment, respectively. Moisture contents in all samples were reduced to <10% after a 1-h dry-heat process. Our results demonstrated that the two-step heat treatment was effective in reducing >5.5 logs of desiccation-adapted Salmonella in aged chicken litter with moisture content at or above 40%. Clearly, the findings from this study may provide the chicken litter processing industry with an effective heat treatment method for producing Salmonella-free chicken litter.
    • Accession Number:
      0 (Industrial Waste)
      0 (Soil)
      059QF0KO0R (Water)
      7664-41-7 (Ammonia)
    • Publication Date:
      Date Created: 20141119 Date Completed: 20151006 Latest Revision: 20191210
    • Publication Date:
      20221213
    • Accession Number:
      10.1089/fpd.2014.1822
    • Accession Number:
      25405539