NDLI: Class 1 integronase gene and tetracycline resistance genes tetA and tetC in different water environments of Jiangsu Province, China

Content Provider	Springer Nature Link
Author	Zhang, Xuxiang Wu, Bing Zhang, Yan Zhang, Tong Yang, Liuyan Fang, Herbert H. P. Ford, Tim Cheng, Shupei
Copyright Year	2009
Abstract	Class 1 integronase gene (intI1) and tetracycline resistance genes (tetA and tetC) from various environmental sites in Jiangsu Province (China) were detected using qualitative PCR (polymerase chain reaction) and quantified with SYBR Green-based qRT-PCR (quantitative real-time PCR) in this study. Qualitative PCR assays demonstrated that intI1, tetA and tetC occurred in the water environments of Taihu Lake, the Nanjing section of the Yangtze River, a sewage treatment plant (STP) in Nanjing City, and two drinking water treating bioreactors. qRT-PCR results showed that abundance of intI1 in lake water and sediments was lower than the tet genes, for a given sample site and date (P < 0.05). On a volumetric basis, lake sediments contained higher concentrations of the three genes by four to five orders of magnitude than water samples, and lake water and sediments sampled in April contained fewer copies of all the genes than the samples collected in June and August (P < 0.05). The levels of intI1, tetA and tetC in the Yangtze River water increased significantly after the river flowed through Nanjing City (P < 0.05). 94.1% integron, 97.2% tetA and 98.3% tetC were removed by the activated sludge process in the STP, and more than 80% of each gene was removed in both of the two biofilters in terms of relative concentration based on sample volume. However, on the basis of DNA mass, lower removals were obtained for both the activated sludge and biofiltration processes.
Starting Page	652
Ending Page	660
Page Count	9
File Format	PDF
ISSN	09639292
Journal	Ecotoxicology
Volume Number	18
Issue Number	6
e-ISSN	15733017
Language	English
Publisher	Springer US
Publisher Date	2009-06-04
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antibiotic resistance gene Tetracycline Integron Water environment Drinking water Environmental Management Ecology Environment Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Medicine Toxicology Management, Monitoring, Policy and Law

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