2009-06-06-世界卫生组织-Meningitis_Week_23,_1-7_June_2009_9页_557kb

Summary of MDSC Meningitis Weekly Bulletin - Week 23, 2009

Epidemiological Overview (Week 23, January 7-13, 2009)

• Weekly Cases and Deaths: 192 cases and 23 deaths reported across 12 districts, with an overall lethality rate of 12.0%. Countries showed varying lethality, e.g., Benin (33.3%), Nigeria (2.0%), and Niger (15.4%).
• Alerts: Districts in alert include Gumel and Mobbar in Nigeria, with attack rates of 5.1 and 5.4 per 100,000 population, respectively.
• Pathogens: Identification methods include PCR, latex agglutination, and culture.

Synthesis (Weeks 1-23, 2009)

• Cumulative Cases and Deaths: Total cases 78,681 and deaths 4,223, with an average lethality rate of approximately 5.4%.
• Epidemic Trends: High burden in Nigeria (70.8% of total cases) and RD Congo (10.8 lethality rate), but situation remained under control. Encouragement for updated district-level data for annual summary.

Pathogen Identification

• Dominant Pathogen: In Cameroun, NmW135 was most prevalent, accounting for 84.6% of positive cerebrospinal fluid samples based on PCR.

Graphical Representations and Trends

• Included but not detailed: Maps showing attack rates for week 23 and cumulative rates through week 23; charts comparing trends with 2008 data for countries submitting current week's data.

Overall Notes

• All countries in the meningitis belt maintained control; data updates were encouraged for annual end-of-season reporting.