Prevalence of quinolone resistance genes, copper resistance genes, and the bacterial communities in a soil-ryegrass system co-polluted with copper and ciprofloxacin.
Chemosphere
; 197: 643-650, 2018 Apr.
Article
en En
| MEDLINE
| ID: mdl-29407828
ABSTRACT
The presence of high concentrations of residual antibiotics and antibiotic resistance genes (ARGs) in soil may pose potential health and environmental risks. This study investigated the prevalence of plasmid-mediated quinolone resistance (PMQR) genes, copper resistance genes (CRGs), and the bacterial communities in a soil-ryegrass pot system co-polluted with copper and ciprofloxacin (CIP; 0, 20, or 80â¯mgâ¯kg-1 dry soil). Compared with the samples on day 0, the total relative abundances of the PMQR genes and mobile genetic elements (MGEs) were reduced significantly by 80-89% in the ryegrass and soil by the cutting stage (after 75 days). The abundances of PMQR genes and MGEs were reduced by 63-81% in soil treated with 20â¯mgâ¯kg-1 CIP compared with the other treatments, but the abundances of CRGs increased by 18-42%. The presence of 80â¯mgâ¯kg-1 CIP affected the microbial community structure in the soil by increasing the abundances of Acidobacteria and Thaumarchaeota, but decreasing those of Firmicutes. Redundancy analysis indicated that the pH and microbial composition were the main factors that affected the variations in PMQR genes, MGEs, and CRGs, where they could explain 42.2% and 33.3% of the variation, respectively. Furthermore, intI2 may play an important role in the transfer of ARGs. We found that 80â¯mgâ¯kg-1 CIP could increase the abundances of ARGs and CRGs in a soil-ryegrass pot system.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Microbiología del Suelo
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Contaminantes del Suelo
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Bacterias
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Farmacorresistencia Microbiana
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Monitoreo del Ambiente
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Quinolonas
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Cobre
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Genes Bacterianos
Tipo de estudio:
Prevalence_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Chemosphere
Año:
2018
Tipo del documento:
Article
País de afiliación:
China