Table 1.

Cases found through indicators and IA cases resulting (with each method)

	all cases	cases with one indicator		cases with two indicators			cases with three indicators
		M*	PA*	M, PH*	M, PA*	PH, PA*	M, PH, PA*
no IA	490	231	6	253	-	-	-
proven IA	56	3	6	17	13	2	15
probable IA	25	6	-	17	-	1	1
possible IA	133	45	-	88	-	-	-

* M = Microbiological indicator, PA = Pathological indicator, PH = Pharmacological indicator