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Table 1 Surveillance of suspected meningitis in six sanitary districts in Burkina Faso, 2004-2008.

From: Definition and characterization of localised meningitis epidemics in Burkina Faso: a longitudinal retrospective study

   District level Health center level
Year District Population size in 1000 (number of HC) Official epidemic declaration Annual incidence per 100 (case count) Peak WIR HC population size in 1000 Number of HC with localised epidemics* Annual incidence per 100 in HC with localised epidemics † Annual incidence per 100 in HC without localised epidemics †
2004          
  Dandé 213.3 (21) No 0.04 (83) 4 9.4 (1.8-22.3) 0 na na
  Houndé 205.3 (25) No 0.03 (64) 5 8.4 (3.0-26.3) 0 na na
  Secteur 15 351.5 (31) No 0.04 (153) 4 6.7 (1.5-50.3) 0 na na
2005         na na
  Dandé 219.7 (21) No 0.03 (72) 5 9.7 (1.8-23.0) 0 na na
  Houndé 212.8 (25) No 0.02 (35) 2 8.7 (3.1-27.2) 0 na na
  Orodara 244.5 (35) No 0.04 (106) 4 6.3 (1.1-19.3) 2 0.94 (0.84-1.04) 0.01 (0-0.18)
  Secteur 15 367.7 (32) No 0.02 (89) 3 6.9 (1.5-53.4) 0 na na
  Secteur 22 405.9 (21) No 0.004 (17) 1 12.8 (2.2-76.0) 0 na na
2006         na na
  Boulsa 269.1 (30) Yes 0.10 (255) 12 9.9 (3.5-18.3) 0 na na
  Dandé 225.6 (22) Yes 0.12 (275) 23 9.5 (1.9-21.5) 2 0.68 (0.49-0.87) 0.08 (0-0.33)
  Houndé 220.2 (25) Yes 0.25 (555) 53 9.0 (3.2-28.2) 8 0.60 (0.31-1.11) 0.14 (0.01-0.38)
  Orodara 269.9 (40) No 0.05 (132) 9 5.9 (1.1-19.9) 0 na na
  Secteur 15 384.8 (34) Yes 0.57 (2182) 83 6.1 (1.57-6.6) 10 1.44 (0.32-7.42) 0.13 (0.02-0.49)
  Secteur 22 431.2 (23) No 0.04 (163) 8 12.7 (2.3-80.5) 0 na na
2007          
  Boulsa 272.9 (30) Yes 0.14 (387) 20 10.0 (3.6-18.6) 2 0.91 (0.53-1.30) 0.08 (0.0-1.30)
  Dandé 232.2 (24) Yes 0.08 (196) 16 9.2 (2.0-22.1) 1 0.33 0.03 (0-0.29)
  Houndé 227.8 (28) Yes 0.09 (196) 9 7.9 (3.3-18.0) 1 0.59 0.03 (0-0.49)
  Orodara 278.2 (40) Yes 0.17 (467) 37 6.1 (1.1-20.5) 3 0.45 (0.32-2.05) 0.02 (0-0.45)
  Secteur 15 388.5 (34) No 0.05 (181) 6 6.3 (1.6-60.0) 0 na na
  Secteur 22 454.2 (25) No 0.03 (140) 4 12.9 (2.0-72.7) 0 na na
2008          
  Boulsa 272.7 (30) Yes 0.14 (372) 29 10.1 (3.6-18.9) 2 1.12 (0.82-1.41) 0.07 (0.0-1.41)
  Dandé 239.1 (24) No 0.04 (97) 5 9.5 (2.1-22.8) 0 na na
  Houndé 235.6 (28) Yes 0.11 (267) 22 8.2 (3.5-18.7) 0 na na
  Orodara 286.9 (43) Yes 0.08 (241) 12 5.64 (1.2-18.7) 1 2.93 0.02 (0-0.32)
  Secteur 15 412.3 (35) Yes 0.04 (154) 21 6.60 (1.7-63.6) 0 na na
  Secteur 22 478.6 (25) No 0.03 (121) 6 13.5 (2.0-77.1) 0 na na
  1. Population and incidence in 26 surveyed districts years at the district level and at the health centre level. If not indicated otherwise, the health centre level columns show median (range).
  2. Peak WIR, highest weekly incidence rate (per 100,000) observed during a given year
  3. HC, health centers
  4. na, not applicable
  5. * A localised epidemic (LE) was defined at the health centre level as 75 suspected meningitis cases reported per 100,000 inhabitants during at least two consecutive weeks, with a minimum of five cases within at least one week.
  6. † In all district years, the annual incidences between health centres with and without localised epidemic differed significantly (P < 0.001, Poisson model).