AmpC β-Lactamase Variable Expression in Common Multidrug-Resistant Nosocomial Bacterial Pathogens from a Tertiary Hospital in Cairo, Egypt

Table 4

Mean fold change in differential expression of AmpC (AmpC expressed vs. AmpC unexpressed) among the bacterial species included in this study.

Bacterial species	Number (%)		Mean fold change of AmpC expression ± SE		value
	AmpC expressed	AmpC unexpressed	AmpC expressed1	AmpC unexpressed
P. aeruginosa	13 (54.17%)	11 (45.83%)	1.552 ± 0.206	0.002 ± 0.239	0.0001
K. pneumoniae	19 (43.18%)	25 (56.82%)	1.913 ± 0.165	0.081 ± 0.086	0.0001
E. faecium	22 (51.16%)	21 (48.84%)	1.633 ± 0.096	−0.100 ± 0.087	0.0001
Total	54 (48.65%)	57 (51.35%)