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Effect of swabbing techniques on the efficiency of bacterial recovery from food contact surfaces.pdf
Food Control 77 (2017) 139e144
Contents lists available at ScienceDirect
Food Control
journal homepage: /locate/foodcont
Effect of swabbing techniques on the ef?ciency of bacterial recovery from food contact surfaces
Suwimon Keeratipibul a, b, *, Thamolwan Laovittayanurak c, Orapin Pornruangsarp a, Yuphakhun Chaturongkasumrit d, Hajime Takahashi d, Punnida Techaruvichit d
a Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand b Molecular Sensory Science Center, Chulalongkorn University, Bangkok, 10330, Thailand c 3M Food Safety, 3M Thailand Ltd., Wattana, Bangkok, 10110, Thailand d Department of Food Science and Technology, Tokyo University of Marine Science and Technology, Tokyo, 108-8477, Japan
article info
Article history: Received 26 September 2016 Received in revised form 26 December 2016 Accepted 10 February 2017 Available online 11 February 2017
Keywords: Swabbing Food hygiene Bio?lm Microbial contamination Food-contact surface
abstract
Four types of swab (cotton, gauze, polyurethane foam (PU foam) and cellulose sponge) were used to recover four food-borne pathogens (Salmonella Typhimurium, Staphylococcus aureus, Escherichia coli and Listeria monocytogenes) from stainless steel and polyester urethane (old and new) surfaces under wet and dry surface conditions. Characteristics of swabs and swab surfaces were analyzed. The cellulose sponge swab showed the highest bacterial release ef?ciency, followed by the PU foam, gauze and cotton swabs. The bacterial Gram type affected the ef?ciency of bacterial recovery on dry surfaces, but the surface type had no apparent effect on the swab ef?ciency. Swabbing on wet surfaces using PU foam or cellulose sponge yielded a higher ef?ciency than with gauze or cotton swabs. Swabbing on dry surfaces with cellulose sponge and cotton swabs showed the highest and lowest swab ef?ciency, respectively. Swabbing on a dry surface decreased the ef?ciency of all swab types to 30%. For recover
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