TABLE 2.

Overview of results obtained with the Xpert MRSA kit and culture from 612 specimens

Reference method and result	No. of specimens with Xpert MRSA kit result of:
	Positive	Negative	Invalidb	Total
Direct culturea
Positive	52	7		59
Negative	46	497	4	547
Total	98	504	4b	606a
Enrichment culture
Positive	70	19		89
Negative	29	490	4	523
Total	99	509	4b	612
Amended resultsc
Positive	85	10		95
Negative	14	499	4	517
Total	99	509	4b	612c

^aDirect culture results were unavailable for six specimens from two patients.

^bFour isolates were invalid by the Xpert MRSA kit.

^cAmended results include numbers of specimens that were culture positive and those that were Xpert MRSA kit positive but culture negative from previously positive patients or from patients from whom a specimen from another site was positive.