2013-03-23-世界卫生组织-Meningitis_weekly_bulletin_18_-_24_March_2013_12页_613kb

Meningitis Weekly Bulletin Summary

I. Epidemiological Situation (Week 12)

Week 12 (March 18-24, 2013)

• Total Suspected Meningitis Cases: 231
• Total Deaths: 17
• Overall Case Fatality Rate (CFR): 7.4%
• Attack Rate (AR): Provincial data shows varying ARs (e.g., 6.7% in Benin, 10.0% in Cameroon).
• District Status: No districts reported in alert or epidemic phase; low data completeness (50.8%) prevented assessment of real situation.
• Affected Countries: Benin, Burkina Faso, Cameroon, Ghana, Mali, Niger, Senegal, Tchad, Togo. (Other countries had no/insufficient data)
• District Reporting: Most districts (except Centrafrique, Mali, Mauritania, Tchad) had no active cases and no alert/epidemic.

II. Synthesis over 12 Weeks (Weeks 01-12)

Period: January 1-March 24, 2013

• Cumulative Suspected Cases: 5,207
• Cumulative Deaths: 525
• Overall CFR: 10.1%
• Cumulative Attack Rate: 10.1%
• Data Completeness: 62.0%

III. Laboratory Data Summary

• CSF Collection: 1,000 out of 5,207 (19.2%) suspected cases had CSF collected.
• Pathogens Identified: Streptococcus pneumoniae was the most common (Confirmed in 85 cases).
• Other Pathogens: Neisseria meningitidis (especially W135 and potentially others), and some unspecified pathogens were found.
• Lab Limitations: Low data completeness, poor CSF collection rate, and low confirmation of causal pathogens were noted.

IV. Monitoring and Recommendations

• Data Quality: Surveillance data remained incomplete and needed verification.
• Data Submission: Countries were strongly encouraged to submit data promptly.

V. Notes

• Comparing the 12-week period to 2012 showed a lower Case Fatality Rate (10.1% vs. 9.1%) but similar overall case numbers initially reported, although totals are cumulative.