TABLE 1.

Results of inhibitor-based disk tests with positive control strains

Strain	Organism	Resistance mechanism	Result with druga-inhibitor combination
			CTT (LN)b	CTT (48)c	FOX (LN)	FOX (48)	CPD (LN)	CPD (48)	CTX (LN)	CTX (48)	CAZ (LN)	CAZ (48)
HVAMC39	K. pneumoniae	ACT-1	Pd	Ne	N	N	P	P	P	N	N	N
Misc304	K. pneumoniae	MIR-1	P	P	P	P	P	P	P	P	P	P
Misc340	K. pneumoniae	FOX-1	P	N	P	P	P	P	N	N	N	N
PAB-CM30	E. coli	FOX-3	P	P	P	P	P	P	P	P	P	P
Misc416	E. coli	FOX-4	P	P	P	P	P	P	P	P	P	P
CCF52	K. pneumoniae	FOX-5	N	P	P	N	P	P	N	N	P	P
Kleb249	K. pneumoniae	CMY-2	P	P	P	P	P	P	P	P	P	P
UMJMH14	K. pneumoniae	DHA-1	P	P	P	P	P	P	P	P	P	P
CDC2085	H. alvei	ACC-1	N	P	N	N	P	P	P	P	P	P
Misc339	K. pneumoniae	MOX-1	N	P	N	N	N	P	N	P	N	P

^aDrugs tested: cefotetan (CTT), cefoxitin (FOX), cefpodoxime (CPD), cefotaxime (CTX), and ceftazidime (CAZ).

^bInhibitor LN-2-128.

^cInhibitor 48-1220.

^dP, positive test: increase of ≥4 mm in zone diameter in the presence of the inhibitor.

^eN, negative test: increase of ≤3 mm in zone diameter in the presence of the inhibitor.