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Table 2 Meningitis cases in the three most common pathogens according to age group, in three periods

From: Meningitis registry of hospitalized cases in children: epidemiological patterns of acute bacterial meningitis throughout a 32-year period

Organism N. Meningitidis* S. Pneumoniae H. Influenzae
Age Group Period N % IR** N % IR** N % IR**
1 to 11 1974–1984 202 63.3 32.8 45 60.8 7.3 41 40.2 6.5
months 1985–1994 69 21.6 27.9 15 20.3 5.6 55 53.9 22.9
  1995–2005 48 15.0 18.9 14 18.9 5.5 6 5.9 2.3
1 to 4 1974–1984 274 50.3 14.4 26 38.8 1.3 49 38.6 2.6
years 1985–1994 136 25.0 16.7 14 20.9 1.7 72 56.7 8.7
  1995–2005 135 24.8 16.3 27 40.3 3.3 6 4.7 0.7
5 to 9 1974–1984 93 38.4 4.1 10 40.0 0.4 7 43.8 0.3
years 1985–1994 38 15.7 3.0 8 32.0 0.6 8 50.0 0.6
  1995–2005 111 45.9 10.1 7 28.0 0.6 1 6.3 0.1
10 to 14 1974–1984 36 33.0 1.6 7 46.7 0.3 1 50.0 0.0
years 1985–1994 13 11.9 0.9 7 46.7 0.5 1 50.0 0.0
  1995–2005 60 55.0 5.1 1 6.7 0.1 0 0.0 0.0
Total 1974–2005 1252 100.0 8.9 186 100.0 1.3 252 100.0 1.7
  1. * N. Meningitidis includes probable and confirmed meningococcal meningitis cases
  2. ** Mean annual Incidence Rate per 100,000 children
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