2008-02-09-世界卫生组织-Meningitis_Week_6,_4_February_2008_to_10_February_2008_9页_580kb

Summary of MDSC Meningitis Bulletin (Week 6, 2008 and Synthesis Weeks 1-6)

I. Epidemiological Situation for Week 6 (10 February 2008)

• Week 6 Cases and Deaths: High caseload reported across African countries. Burkina Faso reported 377 cases and 5 deaths (lethality rate 14.1%), Cote d'Ivoire had 35 cases and 10 deaths (28.6% lethality), and Togo had 23 cases and 7 deaths (30.4% lethality). Total cases nationwide were 557, with 82 deaths (14.7% lethality).

• Alerts and Epidemics: Four neighboring districts in Burkina Faso were in alert phase, and one district in Cote d'Ivoire (Tengrela) was in epidemic phase. Niger had a 100% alert threshold met.

• Key Observations: Transborder epidemic risks noted between Burkina Faso and Cote d'Ivoire due to shared districts.

II. Synthesis of Epidemiological Situation (Weeks 1-6, 2008)

• Cumulative Data: Total cases across reportable countries equaled 2492, with 359 deaths and an overall lethality rate of 14.4%. Countries like Burkina Faso and Niger had high alert and epidemic thresholds met. Cote d'Ivoire showed a lower lethality rate compared to other regions.

• Districts in Epidemic Phase: Burkina Faso and Cote d'Ivoire had epidemic districts along their border, emphasizing the need for transnational coordination. Countries with complete data included most regions, except Chad and Central African Republic.

III. Pathogen Identification

• Dominant Pathogens: Neisseria meningitidis serogroup A (NmA) was the predominant pathogen, accounting for the majority of identified cases. Detection methods included PCR, LATEX agglutination, and culture across various countries.

• Identification Data: Burkina Faso and Niger reported high numbers of NmA cases, with other pathogens minor. Total pathogen identifications were low, with Algeria and other regions not included due to external location.

IV. Graphical Data Representation

• Focus on Visuals: Figures included maps showing district-wise attack rates for weeks 1-6, cumulative trends, and comparative annual trends for 2007-2008. Countries like Central African Republic, Nigeria, and Ghana displayed variations in case counts over time.