Occurrence, abundance, and distribution of sulfonamide and tetracycline resistance genes in agricultural soils across China

Microbial and Viral Communities and Their Antibiotic Resistance Genes Throughout a Hospital Wastewater Treatment System

“…Here, we found that both the influent and effluent from a hospital wastewater treatment system contained ARGs conferring resistance to a variety of antibiotics, including classes with high clinical importance, as well as individual ARGs such as sul1, mefA, and mel that are considered to be clinically concerning. Some of these genes can be commonly found in environments other than hospital wastewater (Zhou et al, 2017), yet bacteria that harbor clinically relevant ARGs are particularly concerning in hospital settings where infections be can resistant to treatment by commonly used antibiotics. In Brazil, multidrug resistant Pseudomonas aeruginosa was detected in wastewater from two different hospitals, and this bacterium demonstrated simultaneous resistance to up to nine different antibiotics that were tested using culture-based techniques (Fuentefria et al, 2011).…”

Occurrence, Distribution, and Risk Assessment of Antibiotics in a Subtropical River-Reservoir System

“…In addition, it has been reported that antibiotics could only be partially metabolized by humans or animals [3]. Then, active substances associated with the antibiotics pass through artificial environments, and may end up in different environmental compartments including water, sediment, and soil, attributed to the fact that most of these chemicals are water soluble and not susceptible to degradation and transformation [6][7][8]. Consequently, it is inevitable that environmental organisms are more or less exposed to these compounds, which are still active with ecotoxic effects even in a very low concentration.…”

Variations of antibiotic resistance profiles in chickens during administration of amoxicillin, chlortetracycline and florfenicol

“…Cycling parameters were as follows: 3 min at 95°C, 35 cycles of 30 s at 95°C, 30 s at the listed annealing temperature (Table ) and 72°C for 30 s. Product specificity was assessed by melting curve analysis using software provided with the instrument (60–95°C, 0·5°C per read, 30 s hold) (Zhou et al . ). For all standard curves, the linear coefficients ( R 2 ) were >0·990, and the efficiencies were between 95 and 105%.…”

“…For example, manure field applications or long‐term wastewater irrigation water generated from antibiotic‐treated animals significantly increase ARG abundance in farm soils (Zhou et al . ; Xiong et al . ).…”