Results: The distribution of pathogens in the infection group was A baumannii (27.66%), K pneumonia (13.83%) and P aeruginosa (12.76%)... The patient group had higher serum concentrations of PCT and CRP than the control group, at 7.30 ± 23.54 ng / ml, 76.70 ± 57.06 mg / l compare to 0.07 ± 0.12 ng / ml; 10.05 ± 10.85 mg / l with p < 0.01, p < 0.001, respectively.