TABLE 4.

Distribution of categorical error rates by microorganism tested for vancomycin susceptibility, 1996

Organism no.	MIC (μg/ml)a	No. (%) of the followingb:
		Total errors	Very major error	Major error	Minor error
1	512	2 (9.1)	1 (4.3)	0 (0)	1 (4.3)
2	64	9 (40.9)	2 (8.6)	0 (0)	7 (30.4)
3	16–32	5 (22.7)	0 (0)	0 (0)	5 (22.7)
4	8	11 (50.0)	0 (0)	0 (0)	11 (50.0)
5	2	0 (0)	0 (0)	0 (0)	0 (0)

^aMIC, actual MIC of vancomycin for each organism, as determined by CDC. 

^bPercent is number of errors/number of participating laboratories.