Table 4.

Detection of indigenous GII NoVs and inhibition of quantification of controls based on two different RNA extraction and purification methods

Sample	Original water vol	No. of copies detected/ liter when using:
		Silica membranea	Silica beadsb
BR-1	Small (50 ml)	7.9 × 102	Not applied
BR-2	Large (20 liters)	NDc	2.2 × 100
BC-2	Large (150 liters)	1.1 × 10−1	2.8 × 10−1

^aSamples extracted and purified by the silica membrane-based method.

^bSamples extracted and purified by the magnetic silica bead-based method.

^cND, not detected.