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Table 4 Percentage of Positive Results on 1st CSF Culture, and Results of Blood Cultures by Organism

From: A systematic review of cases of meningitis in the absence of cerebrospinal fluid pleocytosis on lumbar puncture

Organism Bacterial
1st CSF culture Blood culture
Positive Negative Unknown
Positive Negative Sensitivity Total Initial
S. pneumoniae 18 4 82% 12 12 3 7
N. meningitidis 21 4 84% 16 16 6 3
H. influenzae 12 5 71% 12 9 1 4
L. monocytogenes 1 2 33% 3 3 0 0
Acenobacter 1 0 100% 0 0 0 1
C. septicum 1 0 100% 1 1 0 0
Clostridium sp. 1 0 100% 1 1 0 0
Bacteroides sp
E. coli 5 2 71% 6 6 0 1
Enterbacter 1 0 100% 0 0 1 0
Enterococcus 2 0 100% 0 0 2 0
Gram + Cocci 3 0 100% 1 1 2 0
Group B Streptococcus 6 0 100% 2 2 2 2
M. polymorpha 1 0 100% 0 0 0 1
M. tuberculosis 1 1 50% 0 0 0 2
P. aeruginosa 2 0 100% 0 0 2 0
P. Mirabilis 1 0 100% 1 1 0 0
S. aureus 2 0 100% 0 0 2 0
S. bovis 1 0 100% 0 0 0 1
S. parasanguinis on 1st culture, S. pneumoniae on 2nd culture 1 0 N/A 0 0 0 1
Organism Fungal
  Blood culture
1st CSF culture Positive  
Positive Negative % Positive Total Initial Negative Unknown
Cryptococcus 6 1 86% 1 1 0 6
A. niger 1 0 100% 0 0 0 1
C. albicans 1 0 100% 0 0 1 0
Organism Viral
  Blood culture
1st CSF PCR Positive  
Positive Negative % Positive Total Initial Negative Unknown
Enterovirus 12 0 100% 0 0 0 12
Echovirus type 3 1 0 100% 0 0 0 1
Echovirus type 9 1 0 100% 0 0 0 1
Adenovirus type 3 1 0 100% 0 0 0 1
Herpes Simplex 1 1 0 100% 0 0 1 0