TABLE 1.

Giardia cysts and Cryptosporidium oocysts detected by direct IF microscopy and PCR in filtered water (FW) before and after plant overhaul and in well water

Type of waterGiardiaCryptosporidium
No. of samples positive/no. of samples examined by IFMean no. of cysts/liter (±SD)No. of samples positive/no. of samples examined by PCRNo. of samples positive/no. of samples examined by IFMean no. of oocysts/literNo. of samples positive/no. of samples examined by PCR
FW before plant overhaul9/130.43 ± 0.12/31/130.20/1
FW after plant overhaul0/1000/100/1000/10
Well water2/190.55 ± 0.072/80/1900/8