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KMID : 0353019710080010071
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Korean Journal of Public Health
1971 Volume.8 No. 1 p.71 ~ p.16
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A Study on Bacterial Contamenation of Strawberries Sold at Markets in Seoul
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Abstract
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A Study on Bacterial Contamination of Strawberries sold at Markets in Seoul was made to find the degree of bacterial contamination.
For this study 17 samples were collected at markets of Bul Gwang Dong, Nam Dae Moon and Dong Dae Moon from June 21, 1970 to July 30, 1970 and were examined on the following items.
1. Degree of bacterial contamination.
2. The change of bacterial contamination in Strawberries against temperature.
3. Decreasing rate of bacterial contamination in Strawberries against washing times.
4. Biochemical reaction and toxicity test of Coliform bacterial isolated from strawberries.
As the results of this study the floolwing conclusion were obtained.
1. The degree of Total Viable Bacteria contamination were high point 77.7 ×10??, low point 1.3 ×10?? and Coliform bacteria were high point 54.6 ×10?? low point 0.3 ×10?? organisms per gram.
2. Bacterial number is increased at 2-4℃ refregeration.
3. Bacterial number is not changed at -70℃ during the first 24-72 hrs.
4. Bacterial number has decreased by 66% after washing once by 75% after 3 times washing and by 90% after 5 times washing.
5. Typical Arizona, Aerobacter, Proteus and Esoherichia group were identified by biochemical reaction, and toxicity is lesser than Ty2 strain, but each isolated strain has a similar toxicity.
6. Salmonella and Shigella could not be isolated.
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