Differential patterns of antimicrobial resistance in population subsets of Escherichia coli isolated from waste- and surface waters
| Autor: | Elizabete A. Serra, Célia M. Manaia, Vânia Figueira |
|---|---|
| Přispěvatelé: | Veritati - Repositório Institucional da Universidade Católica Portuguesa |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
Population Sewage Fresh Water Drug resistance 010501 environmental sciences Biology medicine.disease_cause Antimicrobial resistance Waste Disposal Fluid 01 natural sciences Microbiology Integrons 03 medical and health sciences Antibiotic resistance Drug Resistance Bacterial medicine Escherichia coli Environmental Chemistry Cities education Waste Management and Disposal Phylogeny 0105 earth and related environmental sciences 0303 health sciences education.field_of_study 030306 microbiology business.industry Water Biodiversity Pollution 6. Clean water Anti-Bacterial Agents Bacterial Typing Techniques Ciprofloxacin Wastewater Genes Bacterial Water Microbiology business Phylogenetic groups Environmental Monitoring medicine.drug Waste disposal |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | The species Escherichia coli comprises different subgroups with distinct phylogeny, physiology and ecology and, thus, presumably, with different roles in antimicrobial resistance dissemination. E. coli strains isolated from raw and treated municipal wastewater and from urban water streams were characterized in terms of phylogenetic groups, antimicrobial resistance patterns and the presence of class 1 and class 2 integrons. Our main objective was to investigate the contribution of the different phylo-groups in antimicrobial resistance dissemination in urban waters. Groups A and B1 were predominant in all types of water, evidencing, respectively, the lowest and the highest resistance prevalence. Municipal wastewater treatment was accompanied by significant increases of ciprofloxacin and streptomycin resistance (p < 0.01). Antimicrobial resistance prevalence differed significantly between the different phylo-groups and within the same group, mainly in group A. Such differences contributed to explain the higher ciprofloxacin and streptomycin resistance rates observed in treated effluent in comparison with the raw wastewater. We conclude that the dynamics of the bacterial populations has a major role on the dissemination of antimicrobial resistance in the environment. |
| Databáze: | OpenAIRE |
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