TABLE 4.

Occurrence of variations of MICs beyond acceptable limits (±1 log₂ dilution) of geometric mean MIC^a

Laboratory	Agar dilution		Broth microdilution
	24 h	48 h	24 h	48 h
A	79	77	120	101
B	58	51	50	34
C	68	73	52	50
Subtotal	205	201	222	185

^an = 14,112 comparisons. The number of variations beyond acceptable limits is provided. Totals are 406 for agar dilution and 407 for broth microdilution.