IngentaConnect The Fate of Tetracycline Resistant Bacteria in Wastewater Treatme...

Authors: Kim, Sungpyo; Park, Hongkeun; Chandran, Kartik

Source: Proceedings of the Water Environment Federation, WEFTEC 2008: Session 101 through Session 115 , pp. 7508-7516(9)

Publisher: Water Environment Federation

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Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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Abstract:

The overall goals of this study were 1) to monitor the abundance and distribution of tetracycline resistant bacteria (TRB) and several tetracycline resistance genes (TRG) in three full scale wastewater treatment plants (WWTP) and 2) to develop a mathematical model to describe the `carrying capacity' of a given wastewater treatment plant for resistant bacteria. Irrespective the mode of operation or physical location of the WWTPs, significant amounts of tetracycline resistant bacteria (10¹ to10³ CFU/mL) and tetracycline resistance genes (10⁵to10⁷ copies/mL) were discharged into the receiving water even after disinfection. Notably, the percentage of tetracycline resistant bacteria increased upon ultraviolet (UV) disinfection compared to chlorination or no disinfection. Of the seven tetracycline resistance genes tested, tetracycline resistance ribosomal protection genes, especially tet(O) and tet(W) were more abundantly detected than tetracycline resistance efflux genes [tet(A, B, C)] in WWTPs. Using the developed model, it was inferred that the WWTP operating conditions strongly influenced their net TRB “carrying capacity”

The Fate of Tetracycline Resistant Bacteria in Wastewater Treatment Plants as a Function of Operating Characteristics