The biocidal activity of Salmide®, a sodium chlorite-based oxyhalogen disinfectant, was tested alone and in combination with either 1.34 mM disodium ethylenediaminetetraacetic acid (EDTA), 0.347 mM sodium lauryl sulfate (SLS) or 210 mM trisodium phosphate (Na3PO4)
against a nalidixic acid-resistant strain of Salmonella typhimuriumNAr inoculated onto fresh broiler drumstick skin. Following a 10-min exposure to increasing Salmide® concentrations (ranging from 27 to 81 mM) at 37°C, the S. typhimuriumNAr population
on the broiler skin was reduced by 57.3 to 85.2%. Each Salmide® test concentration applied in combination with 1.34 mM EDTA produced S. typhimuriumNAr population reductions in excess of 97%. A similar trend (93.1 to 98.2% reductions) was observed for treatments containing
27, 54 or 81 mM Salmide® and 0.347 mM SLS. However, when S. typhimuriumNAr was exposed to 210 mM Na3PO4 alone, a 99.5% population reduction was observed. This value was not significantly different from those obtained for treatments containing 210
mM Na3PO4 and 27, 54 or 81 mM Salmide®. In addition, 27 mM Salmide® was evaluated alone or in combination with 1.34 mM EDTA for the extension of broiler drumstick shelf-life. Based on the enumeration of mesophilic and psychrotrophic populations, the combined
Salmide® and EDTA treatment was shown to produce a slight extension in broiler drumstick shelf-life compared to an untreated control. Treatment effects detected by drumstick skin Hunter color reflectance measurements during refrigerated storage were inconsistent.
Department of Food Science, Box 7624, North Carolina State University, Raleigh, North Carolina, 27695-7624
Publication date: July 1, 1994
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