TABLE 2.

MRSA PCR-positive and unresolved rates derived from incubation of clinical nasal swab specimen lysates in fresh master mix or frozen master mix stored at −70°C

Master mix performance characteristic	Rate (%) of PCR results:
	Positive	Unresolved
		Initial	Final
Freshly reconstituted	16.3a	1.2b	0.0c
Frozen	15.9	2.8	0.3

^aP = 0.91 versus frozen.

^bP = 0.16 versus frozen.

^cP = 0.32 versus frozen.