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KMID : 0881720130280040324
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Journal of Food Hygiene and Safety
2013 Volume.28 No. 4 p.324 ~ p.329
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Survey of Microbial Contamination of Tomatoes at Farms in Korea
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Kim Won-il
Cho A-Ra
Lee Ju-Han
Kim Se-Ri
Park Kyeong-hun
Nam Ki-Woong
Yoon Yo-Han
Yoon Deok-Hoon
Oh So-Yong
Lee Moon-Haeng
Rhu Jae-Gee
Kim Hwang-Yong
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Abstract
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This study investigated and evaluated contamination levels of bacteria on tomatoes at farms stage to evaluate potential hazards associated with fresh tomatoes. A total of 170 samples, 90 samples from 5 sampling sites from 18 farms and 80 samples from 1 sampling site from 4 farms every month for four months, were analyzed to enumerate aerobic bacterial counts, coliforms, E. coli, Bacillus cereus, Staphylococcus aureus, Escherichia coli, E. coli O157:H7, Salmonella spp., and Listeria monocytogenes. Aerobic bacterial counts ranged from 0.48 to 6.15 Log CFU/ g, with the lowest and the highest bacterial cell counts recorded for A site and E site, respectively. Thirty five percent of the samples from the E site contained more than 2 Log CFU/g. Six samples (6.6%) of 90 samples contained B. cereus less than 1 Log CFU/g. In addition, the contamination level of indicator bacteria and B. cereus in tomatoes were higher on March than on April, May and June (P < 0.05). S. aureus, E. coli, E. coli O157:H7, Salmonella spp. and L. monocytogenes were not detected in the tomato samples. The microbial contamination levels of tomatoes determined in this study may be used as the data for microbiological risk assessment.
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KEYWORD
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tomato, microbiological quality, food-borne pathogen
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