2009-11-27-世界卫生组织-Meningitis_Week_45-48,_2-28_November_2009_9页_549kb

Summary of MDSC Meningitis Weekly Bulletin (Weeks 45-48, 2009)

I. Epidemiological Situation for Week 45-48 (November 28, 2009)

• Overview: The epidemiological situation was generally calm across most countries, except for DR Congo, where an ongoing epidemic of meningococcal meningitis occurred, primarily in schools in Kisangani. A total of 169 cases and 16 deaths were reported from November to December, with 90% of cases aged 2-29 years and predominantly involving schoolchildren and teachers.
• Key Data:
  • Total cases: 310
  • Deaths: 43
  • Overall lethality rate: 13.9%
  • Specific high lethality in Niger (42.9%) and Togo (26.9%).
  • Positive CSF samples for meningococcus C in DR Congo: 14/45.
• Notes: The situation in DR Congo required daily monitoring, and alerts were noted for other countries due to high data thresholds.

II. Annual Epidemiological Summary (Weeks 01-48, 2009)

• Overview: Cumulative data from 2009 shows significant variation in cases and deaths across countries. The annual total deaths exceeded 4,694 with a lethality rate of 5.6%.
• Key Data:
  • Highest case count: Nigeria (56,047 cases).
  • Highest lethality rate: Niger (75% population affected).
  • Some countries like Cameroun and Ethiopia had incomplete data updates.
• Actions Needed: Countries with missing data (Central Africa, Cameroun, Ethiopia, Ghana, Guinea) were encouraged to submit updates for comprehensive surveillance.

III. Additional Notes and Recommendations

• Countries were advised to intensify CSF specimen collection and analysis to detect any unusual trends during the epidemic season.
• Graphical representations (maps and charts) for attack rates and trends from 2008-2009 indicated consistent monitoring in most regions, with DR Congo's epidemic standing out.

For detailed data, refer to the full bulleting.