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

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

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