Table 3—

Data on acquired or persistent microorganisms in patients with ventilator-associated pneumonia (VAP) according to the treatment algorithm

Control group^#			Procalcitonin group^¶
Day after VAP onset	Microorganism	Acquired/persistant	Day after VAP onset	Microorganism	Acquired/persistant
5	Pseudomonas	Persistent	4	Stenotrophomonas	New
5	Pseudomonas	Persistent	4	MRSA	New
5	MRSA	Persistent	5	Pseudomonas	Persistent
8	Pseudomonas	New	9	MRSA and Klebsiella	New
10	Pseudomonas	Persistent	9	Alcaligenes and Acinetobacter	New
12	MRSA and Enterobacter	New	10	MRSA	New
15	Serratia	Persistent	10	Acinetobacter	New
20	Stenotrophomonas	Persistent	15	Klebsiella	Persistent
21	Escherichia coli	New	15	MRSA	Persistent
21	Pseudomonas	Persistent	21	Clostridium difficile	New
24	Enterococcus	New	28	Enterobacter	Persistent
28	Klebsiella	Persistent	28	Pseudomonas	Persistent
28	Pseudomonas	New	30	Pseudomonas	Persistent
28	MRSA	Persistent
28	Pseudomonas	Persistent
28	MRSA and Pseudomonas	New and persistent

MRSA: methicillin-resistant Staphylococcus aureus. Organisms shown are those isolated at significant concentrations from semi-quantitative endotracheal aspirates or quantitative cultures of protected specimen brush (≥10³ cfu·mL⁻¹) and/or bronchoalveolar lavage fluid (≥10⁴ cfu·mL⁻¹). ^#: n = 50; ^¶: n = 51.