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Table 4 Serogroup distributions of N. Meningitidis among Cerebrospinal fluid specimens and bacterial isolates among children aged < 5 years old in China, South Korea, and Vietnam by age group, 1999 through 2002 a

From: An expanded age range for meningococcal meningitis: molecular diagnostic evidence from population-based surveillance in Asia

Serogroup Cerebrospinal fluid Bacterial isolates
China Korea Vietnam Vietnam
  N (%)   N (%)
A 0 0 0 0
B 0 0 2 (9.1) 10 (100)
C 0 1 (6.3) 20 (90.9) 0
W-135 1 (16.7) 0 0 0
X 3 (50.0) 9 (56.3) 0 0
Y 2 (33.3) 6 (37.5) 0 0
Total 6 (100) 16 (100) 22 (100) b 10 (100)
  1. aSurveillance periods: China, January 1, 2000--December 31, 2002; South Korea: September 1, 1999--December 31, 2001; Vietnam: March 4, 2000-March 3, 2002.
  2. bOne specimen could not be linked with the clinical database.