Effect of monolaurin and lactic acid on Listeria monocytogenes attached to catfish fillets.
The purpose of this study was to determine the effects of monolaurin and lactic acid, singly or combined, on Listeria monocytogenes attached to catfish fillets. Skinless catfish fillets were inoculated with L. monocytogenes and dip treated in monolaurin and/or lactic acid solution for various time periods. Results showed that monolaurin up to 400 micrograms/ml had no influence on counts. Conversely, lactic acid-treated fillets had reduced counts compared to controls. Dipping in 0.85, 1.70, or 2.55% lactic acid for 30 min reduced counts by 0.9, 1.4, or 1.3 logs, respectively. Extending the dipping time to 60 min resulted in little additional decrease in counts. Combining monolaurin with lactic acid yielded results similar to lactic acid alone. Hence, population reduction ability resides with lactic acid and not monolaurin.
Verhaegh
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EG
Department of Food Science, Louisiana State University, Agricultural Center, Baton Rouge 70803, USA.
Marshall
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DL
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D000818:Animals; D002397:Catfishes / Q000382:microbiology*; D015169:Colony Count, Microbial; D005989:Glycerides / Q000494:pharmacology*; D007773:Lactates / Q000494:pharmacology*; D019344:Lactic Acid; D007848:Laurates / Q000494:pharmacology*; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000254:growth & development; D050178:Monoglycerides; D013997:Time Factors
D005989:Glycerides; D007773:Lactates; D007848:Laurates; D050178:Monoglycerides; C020777:monolaurin; D019344:Lactic Acid