EGU22-2616
https://doi.org/10.5194/egusphere-egu22-2616
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Distribution of pathogens and antibiotic resistance genes in the vadose zone of soil-aquifer treatment (SAT) system.

Niraj Yadav1, Zeev Ronen2, and Gilboa Arye1
Niraj Yadav et al.
  • 1French Associates Institute for Agriculture and Biotechnology for Drylands, Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Israel
  • 2Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Israel

The main objective of this study was to quantify the distribution of pathogens and antibiotic resistance genes in the vadose zone of the soil aquifer treatment (SAT) system. Soil samples were collected from a treated wastewater infiltration basin to a depth of 25 m in two sampling events: (i) at the end of flooding and infiltration and (ii) following three days of drying before the subsequent flooding event. Viable count parallelly of bacteria compared with microscopic live/dead count and enzymatic activity FDA hydrolysis. The abundance of the total bacteria, coliform, antibiotic resistance bacteria (ARB), were examined.  In addition, total genomic DNA was extracted from soil samples (n-28 for both flooding and drying cycle), and quantitative PCR (qPCR) was used to determine the relative abundance of antimicrobial resistance genes (ARGs), including 1 integron-integrase intI1, blaTEM, blaCTX-M-32, sul1, qnrS.

In both sampling events, the results demonstrate that the distribution of antibiotic resistance genes in the vadose zone exhibits a similar pattern to the one obtained for the examined pathogen. We observed a high concentration of pathogens in topsoil layers and a gradual decline with depth. In this presentation, the profile obtained will be described and discussed with pathogens and ARGs transport and retention in the SAT system. 

 

 

How to cite: Yadav, N., Ronen, Z., and Arye, G.: Distribution of pathogens and antibiotic resistance genes in the vadose zone of soil-aquifer treatment (SAT) system., EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-2616, https://doi.org/10.5194/egusphere-egu22-2616, 2022.

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