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http://dx.doi.org/10.5338/KJEA.2019.38.4.34

Microbiological Quality of Agricultural Water in Jeollabuk-do and the Population Changes of Pathogenic Escherichia Coli O157:H7 in Agricultural Water Depending on Temperature and Water Quality  

Hwang, Injun (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Ham, Hyeonheui (Crop Protection Division, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Park, Daesoo (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Chae, Hyobeen (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Kim, Se-Ri (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Kim, Hwang-Yong (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Kim, Hyun Ju (Crop Foundation Division, National Institute of Crop Sciences, Rural Development Administration)
Kim, Won-Il (Microbial Safety Team, Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
Publication Information
Korean Journal of Environmental Agriculture / v.38, no.4, 2019 , pp. 254-261 More about this Journal
Abstract
BACKGROUND: Agricultural water is known to be one of the major routes in bacterial contamination of fresh vegetable. However, there is a lack of fundamental data on the microbial safety of agricultural water in Korea. METHODS AND RESULTS: We investigated the density of indicator bacteria in the surface water samples from 31 sites collected in April, July, and October 2018, while the groundwater samples were collected from 20 sites within Jeollabuk-do in April and July 2018. In surface water, the mean density of coliform, fecal coliform, and Escherichia coli was 2.7±0.55, 1.9±0.71, and 1.4±0.58 log CFU/100 mL, respectively, showing the highest bacterial density in July. For groundwater, the mean density of coliform, fecal coliform, and E. coli was 1.9±0.58, 1.4±0.37, and 1.0±0.33 log CFU/ 100mL, respectively, showing no significant difference between sampling time. The survival of E. coli O157:H7 were prolonged in water with higher organic matter contents such as total nitrogen (TN), and nitrate-nitrogen (NO3-N). The reduction rates of E. coli O157:H7 in the water showed greater in order of 25, 35, 5, and 15℃. CONCLUSION: These results can be utilized as fundamental data for prediction the microbiological contamination of agricultural water and the development of microbial prevention technology.
Keywords
Groundwater; Human pathogenic bacteria; Reduction rate of E. coli O157:H; Surface water; Water quality;
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Times Cited By KSCI : 1  (Citation Analysis)
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