Evaluation of a Commercial Multiplex PCR for Rapid Detection of Multi Drug Resistant Gram Negative Infections

Table 4: Comparison of MT PCR to a second multiplex PCR for resistance detection.

MT PCR Result	Second Multiplex PCR Concordant	Second Multiplex PCR Discordant	Examples of Difference	Total
CTX-M-1	8	2	One CTX-M-9 in multiplex PCR, one nil detected	10
CTX-M-9	3	1	CTX-M-1 detected	4
TEM	0	4	TEM target not present in second multiplex PCR	4*
SHV	7	1	1 SHV not detected	8
CMY	2	0	No discrepancy	2
DHA	1	0	No discrepancy	1
IMP	10	1	1 IMP not detected by multiplex PCR	11
VIM	2	0	No discrepancy	2

^* - excluded from analysis