Department of Microbiology, Palamuru University, Mahabubnagar, Andhra Pradesh 509001, India.
Biomed Res Int. 2013;2013:348250. doi: 10.1155/2013/348250. Epub 2013 Jun 3.
International drinking water quality monitoring programs have been established in order to prevent or to reduce the risk of contracting water-related infections. A survey was performed on groundwater-derived drinking water from 13 different hospitals in the Mahabubnagar District. A total of 55 bacterial strains were isolated which belonged to both gram-positive and gram-negative bacteria. All the taxa were identified based on the 16S rRNA gene sequence analysis based on which they are phylogenetically close to 27 different taxa. Many of the strains are closely related to their phylogenetic neighbors and exhibit from 98.4 to 100% sequence similarity at the 16S rRNA gene sequence level. The most common group was similar to Acinetobacter junii (21.8%) and Acinetobacter calcoaceticus (10.9%) which were shared by 7 and 5 water samples, respectively. Out of 55 isolates, only 3 isolates belonged to coliform group which are Citrobacter freundii and Pantoea anthophila. More than half (52.7%, 29 strains) of the phylogenetic neighbors which belonged to 12 groups were reported to be pathogenic and isolated from clinical specimens. Out of 27 representative taxa are affiliated have eight representative genera in drinking water except for those affiliated with the genera Exiguobacterium, Delftia, Kocuria, and Lysinibacillus.
为了预防或降低与水有关的传染病的风险，已经建立了国际饮用水质量监测计划。对来自马哈拉施特拉邦地区 13 家不同医院的地下水饮用水进行了调查。共分离出 55 株细菌，包括革兰氏阳性菌和革兰氏阴性菌。所有分类单元均基于 16S rRNA 基因序列分析进行鉴定，根据该分析，它们与 27 个不同的分类单元在系统发育上密切相关。许多菌株与它们的系统发育近缘种密切相关，在 16S rRNA 基因序列水平上表现出 98.4%至 100%的序列相似性。最常见的群组与不动杆菌属 junii（21.8%）和不动杆菌属 calcoaceticus（10.9%）相似，这两种菌分别在 7 个和 5 个水样中被发现。在 55 株分离株中，只有 3 株属于大肠菌群，分别为弗氏柠檬酸杆菌和 pantoea 属anthophila。在属于 12 个群组的 52.7%（29 株）的近缘种中，有一半以上（52.7%，29 株）被报道为致病性的，并从临床标本中分离出来。在 27 个代表分类单元中，有 8 个代表属（除了与异常球菌属、德氏菌属、微球菌属和粘细菌属有关的属）存在于饮用水中。
