		MBL			AmpC
		ompK35	ompK36	MIC (µg/ml)	ompK35	ompK36	MIC (µg/ml)
Enzymes non producers	Range	0.08 - 2.97	0.41 - 5.39	8 - 256	0.06 - 2.97	0.09 - 3.35	8 - 256
Enzymes non producers	Mean ± SD	0.83 ± 0.67	1.55 ± 1.35	73.09 ± 73.83	0.77 ± 0.79	1.19 ± 0.88	82.5 ± 81.67
Enzymes Producers	Range	0.01 - 1.08	0.09 - 5.57	64 - 512	0.01 - 1.46	0.17 - 5.57	16 - 512
Enzymes Producers	Mean ± SD	0.35 ± 0.25	0.98 ± 1.20	243.20 ± 135.53	0.49 ± 0.34	1.32 ± 1.51	198.15 ± 146.15
t				18.25			15.65
p				0.0001^*			0.001^*