期刊
LETTERS IN APPLIED MICROBIOLOGY
卷 59, 期 6, 页码 587-593出版社
WILEY
DOI: 10.1111/lam.12325
关键词
antibiotic resistance genes; biosolid storage; integron; intI1; land application; sul1
资金
- DC WATER
- National Science Foundation CAREER award [0852942]
- Virginia Tech Institute for Critical Technology and Applied Science [TSTS 11-26]
- Department of Civil and Environmental Engineering
- Virginia Tech Graduate School Cunningham Fellowship
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0852942] Funding Source: National Science Foundation
Prior research suggests that cold temperatures may stimulate the proliferation of certain antibiotic resistance genes (ARGs) and gene transfer elements during storage of biosolids. This could have important implications on cold weather storage of biosolids, as often required in northern climates until a time suitable for land application. In this study, levels of an integron-associated gene (intI1) and an ARG (sul1) were monitored in biosolids subject to storage at 4, 10 and 20 degrees C. Both intI1 and sul1 were observed to increase during short-term storage (<2months), but the concentrations returned to background within 4months. The increases in concentration were more pronounced at lower temperatures than ambient temperatures. Overall, the results suggest that cold stress may induce horizontal gene transfer of integron-associated ARGs and that biosolids storage conditions should be considered prior to land application.
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