2003-05-05-世界卫生组织-Meningitis_Week_21,_1_January_2003_to_25_May_2003_4页_103kb

WHO Meningitis Surveillance Report Summary - Week 21, 2003 Meningitis Belt

High-Level Overview

• No ongoing epidemics reported in week 21 (19 to 25 May 2003) in the African meningitis belt.
• Surveillance data covers cases from January 1 to May 25, 2003, showing variations in case counts, case fatality ratios (CFR), and pathogen identifications across countries.
• Key observations include vaccination efforts, disease alerts in specific districts, significant underreporting in some regions, and increased meningitis-related activities in certain areas.

Country-Specific Data Highlights

• Benin: 354 suspected meningitis cases, 77 deaths (CFR 21.7%), with vaccinations conducted.
• Burkina Faso: 7,615 cases, 1,132 deaths (CFR 14.9%), high case load with alerts in border districts.
• Chad: Active surveillance up to week 16, no confirmed activity since, cases pending evaluation.
• Ghana: 1,393 cases, 177 deaths (CFR 12.7%), meningococcal W135 identified in non-epidemic areas.
• Mali: 802 cases, 57 deaths (CFR 7.1%), no active alerts after earlier concerns.
• Niger: 7,029 cases, 566 deaths (CFR 8.1%), significant underreporting noted, with alert districts remaining.
• Nigeria: 3,348 cases, 257 deaths (CFR 7.7%), increased Cryptosporidium surveillance activity reported in several states, vaccinations held.
• Togo: 298 cases, 61 deaths (CFR 21.1%), limitations in lab testing for serogrouping.

Key Observations

• Vaccinations were implemented in multiple countries to address meningitis outbreaks where applicable.
• Alerts for suspected meningitis persisted in several districts, indicating ongoing public health concerns.
• CFR varied widely, from low levels in Mali and Nigeria (approx. 7.1% and 7.7%, respectively) to higher rates in Benin and Togo (21.7% and 21.1%).
• Underreporting was significant in Niger, potentially skewing regional data.
• Weekly case trends, as depicted in the attached graphs, showed fluctuations, with peaks in earlier weeks for most countries.
• Despite the end of reported epidemics in week 21, meningitis surveillance remains active, with increased activity noted in Nigeria and other regions.