Table 5. Antibiotic resistance pattern of bacteria isolated from VAP patients.

Drugs	A. baumannii (n = 55)	P. aeruginosa (n = 45)	K. pneumoniae (n = 45)	E. coli (n = 12)
Ampicillin	-	-	-	100
Amoxy-clavulanic acid	-	91.8		91.7
Amikacin	84.8	48.9	78.4	41.7
Tobramycin	80.4	75.6	88.2	33.3
Gentamycin	88	82.2	80.4	36.4
Ciprofloxacin	90.2	46.7	96.1	91.7
Levofloxacin	95.6	91.4	92.2	83.3
Aztreonam	-	50	90	75
Ceftriaxone	96.7	-	93.8	90
Cefoxitin	-	-	93.8	90
Cefazolin	-	-	100	100
Ceftazidime	-	62.1	-	-
Piperacillin-tazobactam	66.3	53.3	92.2	66.7
Imipenem	85.9	57.8	66.7	50
Meropenem	65.2	48.9	70.6	50
Ertapenem	-	-	56	40
Colistin	0	0	0	0
Tigecycline	0	0	0	0