Microorganism n (%) Culture Streptococcus pneumoniae Mycoplasma pneumoniae Chlamydia pneumoniae Haemophilus. influenzae Klebsiella pneumoniae Pseudomonas aeruginosa MRSA Acinetobacter Total 9 (4.16) 2 (0.92) 1 (0.46) 3 (1.38) 3 (1.38) 1 (0.46) 2 (0.92) 2 (0.92) 1 (0.46) 1 (0.46) 25 (11.57) Sputum Sputum Sputum Sputum TTA Blood TTA TTA TTA Blood MRSA: meticillin-resistant staphylococcus aureus, TTA: transtracheal aspirate.

Table 3: Causative agents in positive cultures of patients.