Decontamination of Salmonella Typhimurium and Listeria monocytogenes on Food-Related Surfaces by a Combination of Sodium Dodecyl Sulfate, Lactic Acid, or Citric Acid Under Different Temperatures
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCMI-10-1_005
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
Background: Salmonella Typhimurium and Listeria monocytogenes are among the most important
foodborne pathogens, and new methods to remove them from surfaces are useful. The aim of this study
was to investigate the bactericidal effect of a combination of sodium dodecyl sulfate (SDS) and some food
matrix-related factors such as temperature, salinity, acidity, and exposure time on L. monocytogenes and
S. Typhimurium in suspension and on different food industry related surfaces.
Methods: The bacterial strains were treated with different concentrations of SDS, citric acid, lactic acid,
and NaCl at different temperatures at various times. At least one concentration was selected that caused
one or less log reduction in the viability of each bacterium, and the combination treatments were examined
in this regard. The best combination was then selected, and its bactericidal effect on the bacteria tested
was evaluated on ceramic, stainless steel, and plastic surfaces.
Results: The results showed that the sensitivity of the bacteria studied to different disinfectants was
different. L. monocytogenes was highly sensitive to SDS, while S. Typhimurium was relatively resistant
to SDS. Both bacteria were more sensitive to lactic acid than to citric acid, and the bactericidal effects of
the disinfectants were enhanced in the combined treatments at ۴۵ºC compared to ۳۵ºC treatments. The
addition of NaCl to the SDS solution resulted in a strong reduction in the bactericidal effect of SDS. The
selected disinfectant removed bacterial biofilms from stainless steel surfaces in a shorter time than ceramic
and plastic surfaces.
Conclusion: The preparation of combined solutions using SDS and an organic acid at an appropriate
concentration and temperature could be useful for removing or reducing bacterial biofilms. Therefore, the
combination of SDS and the lactic acid at ۴۵°C can effectively remove pathogenic bacteria from various
surfaces.
Keywords:
Authors
Siavash Maktabi
Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Box: ۶۱۳۵۵-۱۴۵, Ahvaz, Iran
Mehdi Pourmahdi Brojeni
Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Box: ۶۱۳۵۵-۱۴۵, Ahvaz, Iran
Leila Elahinia
۲Graduated from Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Iran