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Selective concentra...
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Kraupner, NadineGothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för biomedicin, avdelningen för infektionssjukdomar,Centre for antibiotic resistance research, CARe,Institute of Biomedicine, Department of Infectious Medicine,University of Gothenburg
(author)
Selective concentration for ciprofloxacin resistance in Escherichia coli grown in complex aquatic bacterial biofilms
- Article/chapterEnglish2018
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Elsevier BV,2018
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LIBRIS-ID:oai:gup.ub.gu.se/267694
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https://gup.ub.gu.se/publication/267694URI
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https://doi.org/10.1016/j.envint.2018.04.029DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148711URI
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https://research.chalmers.se/publication/503026URI
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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There is concern that antibiotics in the environment can select for and enrich bacteria carrying acquired antibiotic resistance genes, thus increasing the potential of those genes to emerge in a clinical context. A critical question for understanding and managing such risks is what levels of antibiotics are needed to select for resistance in complex bacterial communities. Here, we address this question by examining the phenotypic and genotypic profiles of aquatic communities exposed to ciprofloxacin, also evaluating the within-species selection of resistant E. coli in complex communities. The taxonomic composition was significantly altered at ciprofloxacin exposure concentrations down to 1 μg/L. Shotgun metagenomic analysis indicated that mobile quinolone resistance determinants (qnrD, qnrS and qnrB) were enriched as a direct consequence of ciprofloxacin exposure from 1 μg/L or higher. Only at 5–10 μg/L resistant E.coli increased relative to their sensitive counterparts. These resistant E. coli predominantly harbored non-transferrable, chromosomal triple mutations (gyrA S83 L, D87N and parC S80I), which confer high-level resistance. In a controlled experimental setup such as this, we interpret effects on taxonomic composition and enrichment of mobile quinolone resistance genes as relevant indicators of risk. Hence, the lowest observed effect concentration for resistance selection in complex communities by ciprofloxacin was 1 μg/L and the corresponding no observed effect concentration 0.1 μg/L. These findings can be used to define and implement discharge or surface water limits to reduce risks for selection of antibiotic resistance in the environment. © 2018 Elsevier Ltd
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Ebmeyer, Stefan,1990Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för biomedicin, avdelningen för infektionssjukdomar,Centre for antibiotic resistance research, CARe,Institute of Biomedicine, Department of Infectious Medicine,University of Gothenburg(Swepub:gu)xebmst
(author)
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Bengtsson-Palme, Johan,1985Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för biomedicin, avdelningen för infektionssjukdomar,Centre for antibiotic resistance research, CARe,Institute of Biomedicine, Department of Infectious Medicine,University of Gothenburg(Swepub:gu)xbengg
(author)
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Fick, JerkerUmeå universitet,Kemiska institutionen,Umeå University(Swepub:umu)jefi0001
(author)
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Kristiansson, Erik,1978Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,CARe - Centrum för antibiotikaresistensforskning,Department of Mathematical Sciences,Centre for antibiotic resistance research, CARe,Chalmers tekniska högskola,Chalmers University of Technology,University of Gothenburg(Swepub:cth)erikkr
(author)
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Flach, Carl-Fredrik,1977Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för biomedicin, avdelningen för infektionssjukdomar,Centre for antibiotic resistance research, CARe,Institute of Biomedicine, Department of Infectious Medicine,University of Gothenburg(Swepub:gu)xflaca
(author)
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Larsson, D. G. Joakim,1969Gothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för infektionssjukdomar,CARe - Centrum för antibiotikaresistensforskning,Institute of Biomedicine, Department of Infectious Medicine,Centre for antibiotic resistance research, CARe,University of Gothenburg(Swepub:gu)xlarjo
(author)
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Göteborgs universitetCARe - Centrum för antibiotikaresistensforskning
(creator_code:org_t)
Related titles
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In:Environment International: Elsevier BV116, s. 255-2680160-41201873-6750
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