The correlation between antibiotic resistance gene abundance and microbial community resistance in pig farm wastewater and surrounding rivers.

Abstract:

:Antimicrobial resistance gene (ARG) abundance and microbial resistance (MR) are often used as important indicators of pollution risk; however, the relationship between ARGs abundance and MR in pig farm wastewater remains unknown. In this study, the raw pig farm wastewater, effluent water, upstream river water, domestic wastewater and downstream river water samples were collected. The concentration of 20 subtypes of ARGs and 2 integrons, minimal inhibit concentration (MIC), and bacterial communities were investigated. In this study, 20 subtypes of ARGs and integrons were detected in all sampling sites. The highest abundance of 17 of the 20 subtypes of ARGs was detected in raw pig farm wastewater, and ermA had the maximum average abundance of 108 copies/mL, with up to 2.41 ± 0.12 × 108 copies/mL. There was no significant correlation between MR to three antibiotics (ciprofloxacin, streptomycin and tetracycline hydrochloride) and the abundance of their corresponding ARGs (P > 0.05), and a large difference was detected between the types of ARGs co-occur bacteria and resistance co-occur bacteria in the 5 sampling sites. And the pig farm wastewater treatment (WWT) could effectively reduce the ARGs and MR to the 3 antibiotics. The results presented here show that there may be no obvious correlation between ARGs and MCR in pig farm wastewater and surrounding rivers, which may be due to various environmental factors, highlighting the urgent need for a comprehensive evaluation of relationship between ARGs abundance and MR.

journal_name

Ecotoxicol Environ Saf

authors

Yang Y,Liu Z,Xing S,Liao X

doi

10.1016/j.ecoenv.2019.109452

subject

Has Abstract

pub_date

2019-10-30 00:00:00

pages

109452

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(19)30783-3

journal_volume

182

pub_type

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