Enteropathogenic Bacteria Contamination of Unchlorinated Drinking Water in Korea, 2010

Posted in: Global Water News, Scholarly Scientific Journals, Water Contamination
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Article courtesy of    Si Won Lee, Do Kyung Lee, Hyang Mi An, Min Kyeong Cha, Kyung Jae Kim, Nam Joo Ha | November 11, 2011 ScienceOPEN.com| Shared as educational material

Unchlorinated Drinking Water

The purpose of this study was to assess the microbiological quality of unchlorinated drinking water in Korea, 2010. One hundred and eighty unchlorinated drinking water samples were collected from various sites in Seoul and Gyeonggi province.


To investigate bacterial presence, the pour plate method was used with cultures grown on selective media for total bacteria, total coliforms, and Staphylococcus spp., respectively.


In the 180 total bacteria investigation, 72 samples from Seoul and 33 samples from Gyeonggi province were of an unacceptable quality (>102 CFU/mL). Of all the samples tested, total coliforms were detected in 28 samples (15.6%) and Staphylococcus spp. in 12 samples (6.7%). Most of the coliform isolates exhibited high-level resistance to cefazolin (88.2%), cefonicid (64.7%) and ceftazidime (20.6%). In addition, Staphylococcus spp. isolates exhibited high-level resistance to mupirocin (42%). Species of Pseudomonas, Acinetobacter, Cupriavidus, Hafnia, Rahnella, Serratia, and Yersinia were isolated from the water samples.


The results of this study suggest that consumption of unchlorinated drinking water could represent a notable risk to the health of consumers. As such, there is need for continuous monitoring of these water sources and to establish standards.


To read this research article, click: Enteropathogenic Bacteria Contamination of Unchlorinated Drinking Water in Korea, 2010

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