2012-04-21-世界卫生组织-Meningitis_Week_16,_16_-_22_April_2012_10页_553kb

报告摘要

I. Epidemiological Situation

Week 16 (April 16-22, 2012):
- Total Cases: 673 cases reported across West African countries.
- Highest Burden Countries: Benin (26 cases), Burkina Faso (261 cases), Côte d'Ivoire (5 cases), Nigeria (32 cases), Togo (6 cases).
- Fatalities & Letality Rates: Highest lethality in Niger (15.6%), Togo (16.7%), Central African Republic (18.0%), Chad (4.8%), Senegal (1.1%), Mali (0.0%).
- Alert Status: Burkina Faso had 4 districts with attack rates >= median (5.5-9.7/100,000). Benin had Tanguieta district at 7.9/100,000.
Synthesis (Weeks 1-16, 2012):
- Declining Trends: Activity significantly decreased compared to previous years, with most countries (except Nigeria and Chad) returning to baseline levels.
- Total Cases: 15,749 cases reported cumulatively.
- Highest Burden Countries: Chad (2,828 cases), Burkina Faso (4,572 cases), Togo (261 cases), Cameroon (449 cases), Senegal (514 cases).
- Impact: The epidemic season was characterized by the predominance of NmW135. Lessons should be learned to prepare for the next season.
- Letality: Higher letality rates (e.g., Niger, Central African Republic) still noted.

II. Laboratory Data

Pathogens: Primarily NmW135 (Serogroup W) and Streptococcus pneumoniae (Spn).
Findings: Remained the main causal agents.

Contact:

Inter country Support Team - West Africa
Email: toureb@bf.afro.who.int, djingareym@bf.afro.who.int, linganic@bf.afro.who.int
Location: Ouagadougou, Burkina Faso

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