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Advances in Environmental Research
  Volume 12, Number 1, March 2023 , pages 001-15

Bacterial load and drug resistance in sewage from industrially polluted regions of South Gujarat region
Aneree Desai and Srivathsa Nallanchakravarthula

    Wastewater of anthropogenic origin is known to harbor various bacteria that are known to be of potential risk to human health and environment. It is of utmost importance to monitor such water sources. Coliforms present in the sewage water samples of municipal sewage treatment plants located at three different places in the South Gujarat region (Surat, Navsari and Vapi) of India were analyzed for their coliforms load as well as tested for their drug resistance. Using cultivation-based techniques microbial load and drug resistance (Amoxicillin, Tetracycline, Ciprofloxacin, Erythromycin, Trimethoprim and Sulphamethoxazole) were analyzed. Water treatment statistically significantly decreased the bacterial load in Vapi and Navsari samples. The optical density of with and without antibiotics of all the three locations was shown to increase significantly after 72 hours. Of all the isolates tested, except isolate 'VA5' (resisted up to 90 ug of Ampicillin) all other isolates resisted 256 ug concentration of antibiotics tested. This study indicates that the sewage water is being contaminated with drugs and/or antibiotics due to industrial and/or anthropogenic activities. Regular monitoring of the water quality is required followed by implementation of environmental laws for reducing the pollutants, that are of human health and environment concern.
Key Words
    antibiotics; coliforms; MDR; sewage treatment
Aneree Desai and Srivathsa Nallanchakravarthula: C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Gopal vidya nagar, Tarsadi,
Bardoli-Mahuva road, Surat (Dist), Gujarat, India

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