TABLE 2.

Causative agents

Diagnosis	No. (%) of cases	Microorganisms isolated	Diagnostic procedure	No. of cases
Definite	21 (55.2)	Streptococcus pneumoniae	Blood culture	10
			Transthoracic needle aspiration	1
		Legionella pneumophila	Serology	4
			Urine antigen	2
		Haemophilus influenzae	Blood culture	1
		Klebsiella pneumoniae	Blood culture	1
		Streptoccocus pyogenes	Blood culture	1
		Chlamydia psittaci	Serology	1
Presumptive	8 (21)	Streptococcus pneumoniae	Sputum	6
		Haemophilus influenzae	Sputum	1
		Mixed oral flora	Sputum	1
None	9 (23.6)