THE OCCURRENCE OF ANTIMICROBIAL RESISTANT <i>E. COLI</i> AND EFFECTS OF RAINFALL IN THE RIVESRS OF SOUTH-EAST WATERSHED OF THE LAKE BIWA
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- SUGIE Yoshinori
- 京都大学工学研究科 流域圏総合環境質研究センター
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- IHARA Masaru
- 京都大学工学研究科 流域圏総合環境質研究センター
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- MA Chi-Yu
- 京都大学工学研究科 流域圏総合環境質研究センター
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- TANAKA Hiroaki
- 京都大学工学研究科 流域圏総合環境質研究センター
Bibliographic Information
- Other Title
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- 琵琶湖南東部の河川における薬剤耐性大腸菌の存在実態と降雨の影響
- ビワコ ナントウブ ノ カセン ニ オケル ヤクザイ タイセイ ダイチョウキン ノ ソンザイ ジッタイ ト コウウ ノ エイキョウ
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Abstract
<p> This study is aiming at clarifying the behavior of antimicrobial resistant E. coli discharged on a watershed where livestock farming is active. To this end field investigations in non-rainy events and rainy events were carried out at several locations on Yasu River and Hino River in Shiga Prefecture. The results indicated that increase in the concentarations of E. coli and anitimicrobial E. coli was observed in increasing river flow due to rainy events. To investigate the effect of rainfall to the increase of E. coli concentrations in a river, a continuous sampling campaign at a location on Yasu River was performed in a rainy event. As the results, 1) during a rainy event, E. coli and antimicrobial resistant E. coli concetrations were elevated, 2) the behaviors in rainy runoff of the river were different among E. coli, ampicillin resistant E. coli, and tetracycline resistant E. coli, which suggests the diffenece in their origins and runoff mechanisms, and 3) the relastionship between pollutant loads (L) of E. coli, anitimicrobial resistant E. coli and river flow (Q) was clarified based on actual field measurements for the first time.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76 (7), III_431-III_440, 2020
Japan Society of Civil Engineers