Table 3.

Percentage of bacteria found from endotracheal aspirates in each treatment group

Bacteria	Cefepime -	Cefepime-amikacin -	Cefepime-levofloxacin -
S. pneumoniae	3.3	8.3	7.1
Haemophilus influenzae	6.7	4.2	7.1
S. aureus	23.3 (1)	25	28.6 (2)
E. coli	10	8.3	10.7
Klebsiella spp.	10 (1)	12.5 (1)	3.6 (1)
Proteus spp.	3.3	8.3	0
Enterobacter spp.	10	8.3	14.3 (1)
Serratia marcescens	6.7	12.5	7.1
P.aeruginosa	23.3 (1)	8.3 (1)	17.9
Acinetobacter baumannii	3.3	4.2	3.6

Numbers in parentheses correspond to the number of patients having positive blood culture with the same organism.