NPPA and infection: Specifically, eight infections (25%) of the controls were caused by Acinetobacter baumannii, four infections (12.5%) by Pseudomonas aeruginosa, four infections (12.5%) by non-MDR-Kp, four infections (12.5%) by Staphylococcus aureus, and the remaining 12 infections (37.5%) by other microorganisms (data not shown).