Patients with radiological evidence of pneumonia were tested for serum procalcitonin (PCT) (36 patients in total) and Legionella/Streptococcus pneumoniae urinary antigens. Pneumonia score index (PSI) was applied and empirical antibiotic treatment was initiated according the treating physician's clinical judgment. Patient's procalcitonin test was within normal range (0.05-0.1) in all patients. Additionally, urine antigen results for Legionella and Streptococcus pneumoniae and blood culture that were drawn were also negative. The pneumonia score index was evaluated in these patients and the range was between class II to IV for 12/44 patients [37] .