2003-04-22-世界卫生组织-Meningitis_Week_15,_1_January_2003_to_13_April_2003_4页_145kb

Report Summary: Regional Meningitis Surveillance - End of Week 15, April 13, 2003.

This bulletin from the World Health Organization Multi-Disease Surveillance Centre Ouagadougou covers suspected meningitis cases in the African meningitis belt. It highlights alerts and data from countries such as Mali, Ghana, and Nigeria, with detailed case counts, deaths, case fatality rates (CFR), and pathogen information.

Key Highlights:

• Mali: Banamaba and Kadiolo circles in alert during week 14; San circle in alert during week 15 with 14 cases.
• Ghana: Epidemics occurred in Northern region (Bole district: weeks 3-8; East Maprusi: weeks 4-9) and Volta Region (Ho and North Tongu districts until week 4).
• Nigeria: A vaccine request was made for Jigawa State districts, including S. Tankarkar, Babura, and Gumel Local Government Areas.

Country-Specific Summary:

• Benin: Cases reported from week 1 to week 9, total cases 220, deaths 44, CFR 20.0%. Pathogen Nm identified in week 13.
• Burkina Faso: Cases from week 1 to week 15, 6,665 cases, 979 deaths, CFR 14.7%. Vaccination completed in districts like Batie, Bogande, Manga, Saponé, Po, Zabre, Boulsa, and Tenkodogo-Zorgho.
• Chad: Cases from week 1 to week 13, 333 cases, 53 deaths, CFR 16.0%. Data incomplete for some weeks, with districts in alert.
• Ghana: Cases from week 1 to week 13, 1,242 cases, 157 deaths, CFR 12.6%. Vaccinations held; East Mono district in alert.
• Mali: Cases from week 1 to week 15, 579 cases, 39 deaths, CFR 6.7%. San circle in alert during week 15; isolated Nm W135 cases.
• Niger: Cases from week 1 to week 15, 5,526 cases, 446 deaths, CFR 8.1%. Lab data incomplete for week 12; some districts in vaccine-preventable Nm W135 category.
• Nigeria: Jigawa State cases from week 52 of 2002 to week 11 of 2003, 435 cases, 146 deaths, CFR 33.6%. Pathogen Nm A and W135 identified.
• Togo: Cases from week 1 to week 11, 197 cases, 41 deaths, CFR 20.8%. East Mono district in alert; vaccine request noted.

Additional Notes: Case fatality rates vary significantly across countries, with Nigeria showing the highest CFR (33.6%). Surveillance indicates active meningitis transmission with local variations, and some districts face breakdown of epidemics due to weakened meningococcal strains, potentially linked to vaccination. Vaccination efforts are ongoing, but data from Chad and Niger show incompleteness.

Weekly cases and CFR trends are visualized in attached graphs for each country, showing fluctuations, but no specific peaks or troughs are detailed beyond the text provided.