Table 2. Main microorganisms isolated.

		Intermittent Dosing		Continuous Infusion
Lung
Gram-negative		104		98
Enterobacter cloacae		10		4
Escherichia coli		14		9
Haemophilus influenzae		8		10
Klebsiella pneumoniae		14		9
Pseudomonas aeruginosa		45		45
Other NFGNB		3		4
Other Gram-negative		10		17
Gram-positive		21		22
Staphylococcus aureus		11		14
Streptococcus pneumoniae		5		7
Other Gram-positive		5		1
Abdomen
Gram-negative		20		20
Escherichia coli		2		6
Klebsiella pneumoniae		4		5
Pseudomonas aeruginosa		12		7
Other Gram-negative		2		2
Gram-Positive		2		1
Other
Gram-negative	18		23
Escherichia coli	4		12
Klebsiella pneumoniae	3		2
Pseudomonas aeruginosa	4		6
Other Gram-negative	7		3
Gram-Positive	8		9
Enterococcus faecalis	2		3
Staphylococcus aureus	4		5
Other Gram-positive	2		1

All included microorganisms had in vitro susceptibility to piperacillin/tazobactam.

NFGNB – Non-fermenting Gram-negative bacteria.