{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T00:14:16Z","timestamp":1789776856712,"version":"4.0.1"},"reference-count":72,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,8,22]],"date-time":"2022-08-22T00:00:00Z","timestamp":1661126400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004532","name":"Japan International Cooperation Agency","doi-asserted-by":"publisher","award":["JPMJAS2005"],"award-info":[{"award-number":["JPMJAS2005"]}],"id":[{"id":"10.13039\/501100004532","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP18KK0297"],"award-info":[{"award-number":["JP18KK0297"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["20H04357"],"award-info":[{"award-number":["20H04357"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Microbiol."],"abstract":"<jats:p>\n                    Antibiotic-resistant bacteria-associated infections are responsible for more than 1.2 million annual deaths worldwide. In low- and middle-income countries (LMICs), the consumption of antibiotics for human and veterinary uses is not regulated effectively. Overused and misused antibiotics can end up in aquatic environments, which may act as a conduit for antibiotic resistance dissemination. However, data on the prevalence of antibiotic resistance determinants in aquatic environments are still limited for LMICs. In this study, we evaluated the prevalence and concentration of antibiotic resistance genes (ARGs) in different drinking and environmental water sources collected from the Kathmandu Valley, Nepal, using droplet digital polymerase chain reaction to understand the current situation of ARG contamination. River water and shallow dug well water sources were the most contaminated with ARGs. Almost all samples contained\n                    <jats:italic>sul1<\/jats:italic>\n                    (94%), and\n                    <jats:italic>intI1<\/jats:italic>\n                    and\n                    <jats:italic>tet<\/jats:italic>\n                    (A) were detected in 83 and 60% of the samples, respectively. Maximum ARG concentration varied between 4.2 log\n                    <jats:sub>10<\/jats:sub>\n                    copies\/100 ml for\n                    <jats:italic>mecA<\/jats:italic>\n                    and 9.3 log\n                    <jats:sub>10<\/jats:sub>\n                    copies\/100 ml for\n                    <jats:italic>sul1<\/jats:italic>\n                    . Significant positive correlations were found between ARGs (\n                    <jats:italic>r<\/jats:italic>\n                    &amp;gt; 0.5,\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.01), except for\n                    <jats:italic>mecA, qnrS<\/jats:italic>\n                    , and\n                    <jats:italic>vanA<\/jats:italic>\n                    . As\n                    <jats:italic>sul1<\/jats:italic>\n                    and\n                    <jats:italic>intI1<\/jats:italic>\n                    were detected in almost all samples, the presence of these genes in a given sample may need to be considered as background antibiotic resistance in LMICs. Therefore, monitoring of ARGs, such as \u03b2-lactam ARGs, quinolone resistance genes, and vancomycin resistance genes, may provide a better picture of the antibiotic resistance determinants in aquatic environments of LMICs.\n                  <\/jats:p>","DOI":"10.3389\/fmicb.2022.894014","type":"journal-article","created":{"date-parts":[[2022,8,22]],"date-time":"2022-08-22T03:17:44Z","timestamp":1661138264000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":32,"title":["Prevalence of antibiotic resistance genes in drinking and environmental water sources of the Kathmandu Valley, Nepal"],"prefix":"10.3389","volume":"13","author":[{"given":"Mohan","family":"Amarasiri","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsubasa","family":"Takezawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bikash","family":"Malla","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Furukawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeevan B.","family":"Sherchand","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eiji","family":"Haramoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazunari","family":"Sei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,8,22]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"105","DOI":"10.3389\/fmed.2019.00105","article-title":"Antimicrobial resistance in Nepal.","volume":"6","author":"Acharya","year":"2019","journal-title":"Front. 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