Lee Si Won, Lee Do Kyung, An Hyang Mi, Cha Min Kyeong, Kim Kyung Jae, Ha Nam Joo
College of Pharmacy, Sahmyook University, Seoul, Korea.
Environ Health Toxicol. 2011;26:e2011016. doi: 10.5620/eht.2011.26.e2011016. Epub 2011 Nov 11.
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 (>10(2) 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.
本研究旨在评估2010年韩国未经过氯化处理的饮用水的微生物质量。从首尔和京畿道的不同地点采集了180份未经过氯化处理的饮用水样本。
为调查细菌的存在情况，采用倾注平板法，分别在用于检测总细菌、总大肠菌群和葡萄球菌属的选择性培养基上培养。
在对180份样本进行的总细菌检测中，首尔的72份样本和京畿道的33份样本质量不合格（>10²CFU/mL）。在所有检测样本中，28份样本（15.6%）检测出总大肠菌群，12份样本（6.7%）检测出葡萄球菌属。大多数大肠菌群分离株对头孢唑林（88.2%）、头孢尼西（64.7%）和头孢他啶（20.6%）表现出高度耐药性。此外，葡萄球菌属分离株对莫匹罗星（42%）表现出高度耐药性。从水样中分离出了假单胞菌属、不动杆菌属、贪铜菌属、哈夫尼亚菌属、拉恩菌属、沙雷菌属和耶尔森菌属。
本研究结果表明，饮用未经过氯化处理的饮用水可能对消费者健康构成重大风险。因此，需要持续监测这些水源并制定标准。
