2023-04-22-世界卫生组织-Meningitis_Weekly_bulletin_17_to_23_April_2023_18页_1mb

Meningitis Weekly Bulletin Summary

Epidemiological Situation

• Week 16 (April 17-23, 2023):
  • Total Suspected Cases: 322 cases, 14 deaths (CFR 4.3%).
  • No districts reached the epidemic threshold; 5 districts at alert level (Benin 2, Niger 2, Senegal 1).
    -Countries reporting: 14 countries.

Outbreak Monitoring

• Notable Alerts:

  • Benin: Districts Bassila and Pobé reached alert thresholds.
  • Niger: Zinder district returned to alert phase; Mirriah in alert phase.
  • Senegal: Diamniadio district reached alert threshold.

• Global Trends (Jan 16 - Apr 16, 2023):

  • Cumulative cases: 9,062 suspected cases, 532 deaths (CFR 5.9%).

Laboratory Data

• Sample Analysis: 3,000 CSF samples tested, 1,524 negative, 485 positive.
• Pathogens Identified (to date):
  • Neisseria meningitidis C (NmC): 53.2%
  • Streptococcus pneumoniae: 35.7%
  • Other strains (Hi non-b, Hib, NmW, etc.) accounted for the rest.

Vaccination and Preparedness

• Combat Meningitis Initiative: Ongoing vaccination campaigns, including MenAfriVac.
• Reactive Vaccination:
  • Niger: Vaccinated 100% of target at-risk population (528,801 recipients). Cases reduced after vaccination.
  • Nigeria: 115% vaccine coverage, reduction in cases noted post-campaign.
• Targeted Epidemic Preparedness: Proactive measures include robust lab capacity building, ICG support activation, and country sensitization.

Recommendations and Actions

• Countries encouraged to strengthen surveillance, further lab testing, and CIWG/ICG linkage for epidemic preparedness.
• Sustained effort toward defeating meningitis by 2030 via epidemic control and coordination mechanisms.