Table 4.

Positive predictive values of a sample that reacts positive in two FeLV test systems (positive predictive value of test combinations)

	Witness	Snap Combo Plus	Fastest	Duo Speed	Virachek FeLV	PetChek FeLV	One-Step
Witness		81.4	91.9	94.6	83.3	87.2	93.5
Snap Combo Plus			87.5	92.3	81.8	85.0	90.6
Fastest				94.6	89.7	91.9	96.7
Duo Speed					92.3	92.1	94.0
Virachek FeLV						85.4	90.6
PetChek FeLV							90.3
One-Step

See Table 1 for the manufacturers' contact information.