AWWA WQTC69340

This powerpoint presentation begins by presenting current challenges of human enteric viruses, including the following:regulatory framework uses coliform bacteria to assesspathogen risk in source and drinking waters; indicator bacteria not ideal for viruses;lack of co-occurrence in environment;differential susceptibility through treatment;waterborne disease outbreaks in coliform-negativewaters; and, there is a need for a better predictor of viral risk. Topics covered include: indicator bacteria and viruses - correlations and contradictions; virus detection - methods and alternative indicators; and, Torque Teno Virus (TTV) - a potential indicator of enteric viruses. Presentation summary includes the following:traditional bacterial indicators appear to indicatepathogenic bacteria well, but not enteric viruses;lack of reliable correlation in surface waters, groundwaters, and treatment systems; waterborne outbreaks of virus etiology under coliform-negativeconditions;coliphages and other enteric viruses proposed but notintegrated into regulatory framework;TTV prevalence, temporal stability, and lack ofpathogenicity differ from enteric viruses; and,viral analog to traditional bacterial indicators. Includes 19 references, tables.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

5

File Size:

1 file , 1.1 MB