2009-03-21-世界卫生组织-Meningitis_Week_12,_16-22_March_2009_11页_1mb

MDSC Meningitis Weekly Bulletin - 2009 Week 12 Summary

I. Epidemiological Situation (Week 12, 16-22 March 2009)

• Niger and Nigeria are the most affected countries.
  • Niger: 5,729 cases and 206 deaths (3.6% case fatality rate).
  • Nigeria: 2,149 cases and 5.4 deaths (case fatality rate).
• Chad is affected, with Ndjamena district in epidemic phase.
• Alert/Districts in Epidemic (Week 12):
  • Burkina Faso: Koungoussi, Titao, Ziniaré (Alert); Full reporting coverage (100.0%).
  • Niger: 57 LGAs in epidemic, 33 LGAs in alert; Full reporting coverage (100.0%).
  • Chad: Goundi district in alert; Ndjamena district in epidemic.

II. Full-Year Situation (Weeks 1-12, 2009)

• Cumulative cases (01-12): 33,810; Deaths: 2,135 (6.3% overall CFR).
• Countries with high CFR:
  • Central African Republic (41.5%), Republic of Congo (11.7%).
• Alert/Districts:
  • Chad: 100% reporting (all districts covered).
  • Niger: 100% reporting (all districts covered); Percentage of districts in epidemic: 57/66, Alert: 33/66.

III. Pathogen Identification (PCR, LATEX, Culture)

• Niger and Nigeria predominantly have Neisseria meningitidis A.
• Burkina Faso shows a predominance of Streptococcus pneumoniae.
• Total lab-confirmed cases reported (01-12): 1,572 (PCR, LATEX, Culture).

IV. Graphical Representation & Trends

• Ongoing epidemics in Niger and Nigeria.
• Trend Comparison (2008 vs 2009):
  • Some countries show decreased cases (e.g., Burkina Faso).
  • Others show fluctuations or peaks in specific weeks noted in data.