TABLE 2.

Fast Phage somatic presence-absence testing in 5 laboratories

Lab no.Spike level (PFU/100 ml)No. of positive samples for water type and assay:
Reagent waterGroundwater
FluorescenceSTEP-1STEP-2FluorescenceSTEP-1STEP-2
11.5101010101010
21.5777889
3-11.7910101099
3-21.5101010101010
4-11.7779989
4-21.4777566
51.51071010610