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http://dx.doi.org/10.13103/JFHS.2019.34.2.178

Antibacterial Effects of Atmospheric Plasma against Main Foodborne Bacteria on the Surface of Dried Filefish (Stephanolepis cirrhifer) Fillets  

Park, Shin Young (Institute of Marine Industry, Gyeongsang National University)
Publication Information
Journal of Food Hygiene and Safety / v.34, no.2, 2019 , pp. 178-182 More about this Journal
Abstract
This study investigated the antibacterial effects of BioZone atmospheric plasma (AP) against Bacillus cereus (F4810/72) and Staphylococcus aureus (ATCC 6538) as the major foodborne bacteria on the surface of dried filefish (Stephanolepis cirrhifer) fillets. The fillets were experimentally contaminated with 7-8 log CFU/mL of B. cereus or S. aureus using a spot inoculation method. Bacterial counts were measured by standard plate method on tryptic soy agar, and were significantly reduced with the increase in the treatment time (1, 3, 5 or 20 min) of AP on the fillets (p < 0.05). The reductions of the pathogens by AP treatment ranged from 0.9 to 2.93 logCFU/g for B. cereus and from 1.04 to 2.55 logCFU/g for S. aureus. A reduction of >1-logCFU/g for B. cereus and S. aureus was observed on the fillets treated with AP for >3 min. The differences in color on the Hunter scale (L=light vs. dark, a=red vs. green, b=yellow vs. blue) of the fillets were not significantly different between the nontreated (control) and AP-treated fillets (p>0.05). This study suggested that 3 min of AP could be effective in reducing >90% of the bacteria without causing any concomitant changes in the color of the fillets.
Keywords
Bacillus cereus; Staphylococcus aureus; Atmospheric Plasma; Dried filefish fillet; Hunter color;
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