Bacterial brain abscess in patients with nasopharyngeal carcinoma following radiotherapy: microbiology, clinical features and therapeutic outcomes

Table 2 Causative pathogens of bacterial brain abscesses without or without NPC

	Non-NPC patients	NPC patients
	n = 198 (%)	n = 12 (%)
Gram-negative bacilli (n = 50)	49 (24.7)	1 ^α (8.3)
Streptococcus species (n = 43)
Viridans streptococci	31 (15.7)	4 (33.3)
Other Streptococci	8 (4.0)	0
Anaerobic pathogens (n = 38 )	37 (18.7)	1 ^β (8.3)
Staphylococcus species (n = 21)
Staphylococcus aureus	9 (4.5)	2 (16.7)
Other Staphylococcus species	10 (5.1)	0
Mixed bacterial pathogens (n = 19)	18 (9.1)	1 ^γ (8.3)
Negative culture (n = 39)	36 (18.2)	3 (25)

Note: α, Pseudomonas aeruginosa; β, Fusobacterum nucleatum; γ,Staphylococcus aureus, Enterococcus species, Pseudomonas aeruginosa.

ISSN: 1471-2334