2016-03-19-世界卫生组织-Meningitis_weekly_bulletin_14_-_20_March_2016_14页_1mb

Meningitis Weekly Bulletin Analysis - March 14-20, 2016

I. Epidemiological Situation - Week 11

• Countries Reporting Cases: Benin, Burkina Faso, Cameroon, Central African Republic, Côte d'Ivoire, Ethiopia, Ghana, Mali, Niger, Nigeria, Senegal, Togo.
• Total Cases (Week 11): 870 cases reported in 10 countries.
• Total Deaths (Week 11): 65 deaths reported.
• Case Fatality Rate: 7.5%.
• Alert/Epidemic Districts - Week 11:
  • Burkina Faso: 3 districts in alert, no epidemic districts.
  • Cameroon: 1 district reached alert threshold.
  • Ethiopia: 5 districts reached alert threshold.
  • Ghana: 5 districts in epidemic, 8 districts in alert.
  • Niger: 4 districts in alert.
  • Nigeria: 2 districts reached alert threshold.
  • Togo: 4 districts in epidemic, 3 districts in alert.

II. Synthesis - Weeks 01-11

• Cumulative Cases: 9,501 suspected meningitis cases reported.
• Cumulative Deaths: 792 deaths, yielding an overall CFR of 8.3%.
• Alert/Epidemic Districts (Cumulative):
  • In Epidemic Phase: 40 districts.
  • In Alert Phase: 82 districts.

III. Laboratory Data - Weeks 01-11

• Samples Tested: 4,316 laboratory samples collected from 9,501 suspected cases (45.4%).
• Predominant Pathogens:
  • Streptococcus pneumoniae (Sp): 392 cases (29.0%).
  • Neisseria meningitidis serogroup W (NmW): 375 cases (27.7%).
  • Neisseria meningitidis serogroup C (NmC): 251 cases (18.6%).
• Other Information:
  • High number of undetermined Neisseria meningitidis cases reported by Ghana (85) and Togo (92).
  • Three Nm serogroup A (NmA) cases reported by Togo.
  • Democratic Republic of the Congo: Outside the meningitis belt, thresholds not applicable.

Summary
This bulletin summarizes the meningitis situation in West and Central Africa for week 11 (March 14-20, 2016) and the period weeks 1-11 (January 17-February 6, 2016). There was significant activity across multiple countries, with Ghana and Togo reporting the highest case counts in week 11. Cumulatively over weeks 1-11, 9,501 cases were reported with a high case fatality rate of 8.3%. Streptococcus pneumoniae remained the most commonly identified pathogen in laboratory samples.