2009-05-30-世界卫生组织-Meningitis_Week_22,_25-31_May_2009_9页_550kb

报告摘要

Total Cases and Deaths: 306 cases reported, with 39 deaths, resulting in a lethality rate of 12.7%.
Country-Specific Data:
- Benin: 2 cases, 1 death.
- Burkina Faso: 47 cases, 12 deaths.
- Cameroon: 1 case, 0 deaths.
- Ghana: 6 cases, 3 deaths.
- Mali: 5 cases, 1 death.
- Niger: 67 cases, 5 deaths.
- Nigeria: 62 cases, 2 deaths.
- Chad: 17 cases, 1 death.
- Togo: 3 cases, 0 deaths.
- Total for week: 306 cases, 39 deaths.
Alerts and Epidemics: Nigeria had one district (Chibok) in epidemic status and another (Jere) in alert status in Borno State.
Pathogen Identification: In Nigeria, W135 was predominant in identified pathogens.
General Comments: General calm observed across most countries, except for Nigeria. Cameroon's data showed no changes from previous weeks.

Overall Statistics: Total cases reported: 78,418, with 4,055 deaths, leading to a lethality rate of 5.2%.
High-Impact Countries:
- Nigeria: Highest burden with 2,307 cases and 4.1% lethality.
- Burkina Faso: High cases, 100% lethality.
- Cameroon: 12.7% lethality, with 5 districts crossing epidemic thresholds.
Trends: Notifications showed interruptions, but overall control improvements. Lethality rates varied significantly by country.

Laboratory Methods: Utilized PCR, LATEX agglutination, and culture for pathogen confirmation.
Key Pathogens: W135 serogroup predominant in several countries, notably in Nigeria. In Cameroon, this serogroup was most common in CSF samples.
General Findings: Cameroon had the highest number of positive W135 cases (84.6% prevalence among positive samples).