POLIOVIRUS RECOVERY FROM TAP WATER AFTER CONCENTRATION OVER GLASS POWDER AND GLASS WOOL

Two concentration methods for recovering poliovirus from tap water are compared. Samples of tap water are artificially contaminated with pol iovirus 1 Lsc 2ab and concentrated by adsorption-elution over either g lass powder or glass wool. The results show that, for great viral cont amination, the glass powder method provided a higher recovery yield th an the glass wool method. But the glass wool method had the greater se nsitivity. Viruses were detected in 73.9% for viral contaminations of 4 to 50 PFU 20 l-1 when using the glass wool method although with the glass powder method viruses were detected in only 52.2 %.