2006-09-30-世界卫生组织-Meningitis_Week_36-39,_4_September_2006_to_1_October_2006_9页_739kb

MDSC Meningitis Weekly Bulletin Summary

Time Period： Weeks 36-39, 2006

Key Findings:

1. Epidemiological Situation (Weeks 36-39, Sep 4 - Oct 1 2006):

   • Total Cases & Deaths: 417 cases, 67 deaths, Case Fatality Rate (CFR) 16.1% for the period.
   • Districts with Alert: Togo (commune V, Lomé) at week 36.
   • Meningitis Belt Countries: Benin (4 deaths/CFR 40%), Burkina Faso (6 deaths/CFR 11.5%), Cote d'Ivoire (7 deaths/CFR 25%), Mali (0 deaths/CFR 0%), Niger (0 deaths/CFR 0%), RD Congo (49 deaths/CFR 18.6%), Togo (1 death/CFR 2.3%). Non-belt countries had higher/undefined thresholds.
   • Diagnostic Data: Highest proportion of confirmed cases (NmW135) came from Burkina Faso. Highest proportion of Pneumococcal (Spn) cases from Niger. Several countries, including Benin, noted high CFRs. Bénin reported potentially high concern due to germ profile (NmA and NmW135).
   • Benin: High CFR noted during the reporting period.
   • Togo: Active investigation to identify case origin.

2. 2006 Year-To-Date Summary (Weeks 1-39):

   • Total Cases & Deaths: 37,304 cases, 3,345 deaths, Overall CFR 9.0%.
   • Meningitis Belt Countries: High reporting completeness across most countries. Burkina Faso had lowest recorded CFR (8.6%) excluding non-belt countries like Niger (7.1%) and RD Congo (14.3%). Countries needing enhanced surveillance reported lower completeness initially (Ethiopia, Guinea, Ghana).

3. Pathogens Identified (Weeks 1-39, 2006):

   • Types: Main pathogens included Neisseria meningitidis (Nm) serogroups (NmA, NmW135), Streptococcus pneumoniae (Spn), Haemophilus influenzae type B (Hib).
   • Dominance: Hib and Spn were largely dominant in reporting countries.
   • Specific Data: Niger reported high numbers of Spn cases (437) but no Hib; Benin reported cases of both NmA and NmW135; RD Congo had cases of Nm exclusively (no Spn/Hib reported); Mali had Spn cases.

Geographical Representation & Trends:

• Provided maps were unavailable, but figures showed trends in attack rates and comparative case numbers across years, focusing on several affected countries within the meningitis belt (Côte d'Ivoire, Chad, Central African Republic, Cameroon, Ethiopia).