S. Sorn, Sulfikar, M.-Y. Lin, M. Shuto, M. Noguchi, R. Honda, R. Yamamoto-Ikemoto, T. Watanabe
There is considerable concern regarding antibiotic resistance in the water environment due to antibiotic residues from anthropogenic origins. The low antibiotic concentration in the water environment may promote the selection of antibiotic resistance. However, it is unclear how environmental factors affect resistance selection. We investigated the proliferation of quinolone-susceptible faecal bacteria (E. coli) exposed to low norfloxacin concentration (ng/L) at variable temperatures, exposure times, and carbon concentrations, simulating the conditions of the water environment. The induction of antibiotic resistance in thirteen E. coli isolates was more likely to occur at 37 °C. However, resistance also occurred at temperatures as low as 25 °C, provided a longer exposure time of 5 days. These results suggest that antibiotic resistance is more likely to be induced in regions where temperatures may reach 25-37 °C, such as tropical regions. © 2022 The Authors.
Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan; Chemistry Department, Universitas Negeri Makassar, Makassar, Indonesia; Department of Agriculture, Ibaraki University, Inashiki, Japan; Faculty of Geosciences and Civil Engineering, Kanazawa University, Kanazawa, Japan; Department of Food Life and Environmental Sciences, Yamagata University, Tsuruoka, Japan
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