Figure 2: Comparison of polymerase chain reaction (PCR) test and blood culture (BC) in cases with positive PCR test in which antibiotics were administered. Case 1: A 45-year-old man with retroperitonitis due to pancreatitis. Enterobacter spp. and Klebsiella spp. were detected in samples obtained by surgical procedure. Case 2: A 63-year-old woman with cholecystitis. Escherichia coli was detected in purulent bile. Enteritis due to MRSA became a complication after day 7. Case 3: A 63-year-old man with mediastinitis due to pharyngitis. Streptococcus spp. was detected in samples obtained by surgical procedure. Case 4: A 67-year-old woman with meningitis. Streptococcus pneumoniae was detected in cerebrospinal fluid. Case 5: A 69-year-old man with retroperitonitis due to pancreatitis. Pseudomonas aeruginosa was detected in samples obtained by surgical procedure. Case 6: An 89-year-old woman with urinary tract infection complicated by pneumonia. E. coli was detected in a urinary sample. Case 7: A 61-year-old woman with necrotizing fascitis due to pharyngitis. Streptococcus spp. was detected in samples obtained by surgical procedure. Case 8: A 53-year-old man with necrotizing fascitis of the bilateral lower limbs. Staphylococcus aureus was detected in samples obtained by surgical procedure. Case 9: A 58-year-old man with abdominal abscess due to traumatic peritonitis. S. aureus was detected in samples obtained by surgical procedure. Case 10: A 77-year-old man with pneumonia. P. aeruginosa was detected in samples of tracheal aspirate.