2015-03-21-世界卫生组织-Meningitis_weekly_bulletin_16_-_22_March_2015_12页_1mb

Meningitis Weekly Bulletin Summary (Week 12, 2015)

I. Epidemiological Situation (Week 12)

• Total Cases & Deaths: 674 cases, 65 deaths (lethality 9.6%).
• Countries with Active Cases: Benin, Burkina Faso, Cameroon, Guinea, Ghana, Mali, Niger, Nigeria, Senegal, Chad.
• Alert/Epidemic Districts: Four districts in epidemic phase (Ghana, Niger, Nigeria, specific districts mentioned), four in alert phase.
• Districts by Vaccination Status: Partially/fully vaccinated countries noted (P/T).
• Key Details:
  • Ghana & Niger reported high attack rates in specific districts (Nadom AR 19.3%, Gaya AR 5.6%).
  • Nigeria's Aliero LGA had high attack rate (69.1%).

II. Cumulative Situation (Weeks 01-12)

• Total Cases & Deaths: 5988 cases, 492 deaths (lethality 8.2%).
• District Completion: Overall data completeness 62.8%.

III. Laboratory Data

• CSF Samples Tested: 861/5988 cases (14.4% sampled).
• Pathogens Identified:
  • Neisseria meningitidis serogroup C (NmC) was predominant, especially in Nigeria & Niger (47 cases).
  • Streptococcus pneumoniae (Spn) was the most identified pathogen overall (137 cases).

IV. Analysis & Notes

• High incidences noted in partially/fully vaccinated zones, but MenAfriVac thresholds applicable only within the African meningitis belt.
• Reactive measures like vaccination campaigns were planned for high-risk zones (e.g., Niger).

This summary focuses on key epidemiological indicators and district-level trends for cerebrospinal meningitis in week 12 of the 2015 season, based on the provided French-English bulletin.