2009-02-14-世界卫生组织-Meningitis_Week_05-07,_26_January_-_15_February_2009_9页_926kb

I Epidemiological Situation Week 5-7 (Jan 25-Feb 11, 2009)

• Burkina Faso: 722 cases, 95 deaths (13.2% lethality). 8 districts under alert, 1 district in epidemic.
• Niger: 893 cases, 46 deaths (5.1% lethality). 5 districts under alert, 2 in epidemic.
• Nigeria: No reported cases during this week.
• Cote d'Ivoire & Guinea: Elevated case reports (respectively 57 cases & 57 cases) but no confirmed increases yet.
• Lethality: Benin (13.6%), Togo (14.3%), Ghana (45.8%).

District-Wise Alerts/Epidemics:

• Benin: Kérou district under alert.
• Burkina Faso: Gayéri, Manni, Pama, Toma, Solenzo, Sapouy, Ziniaré under alert; Titao district in epidemic.
• Central Africa: Nana-Grébizi district under alert.
• Niger: Magaria, Zinder, Keita, Matameye, Madarounfa under alert; Gaya and Tessaoua districts in epidemic.
• Nigeria: 23 LGAs in epidemic, 20 under alert. Details on page 3.
• Chad: Goundi district under alert.
• Togo: Blitta district under alert.

II Synthesis (Weeks 1-7 2009)

• Burkina Faso: Highest cumulative cases (1,248) and deaths (178), with epidemic thresholds reached in several districts.
• Niger: High but lower lethality case count (1,276) but deaths (63).
• Nigeria: Lowest lethality in 2009 but many districts affected (29 exceeding alert thresholds).
• Total: 6,676 cases reported in 8 countries by week 7, with Nigeria leading cases (3,506), Benin cases (98), etc.
• Key parameters like Cases, Deaths, Lethality, and the % of weeks above alert epidemic thresholds were tracked.

III Pathogen Identification (PCR, Latex, Culture)

• Predominant pathogen was Neisseria meningitidis A (NmA) in many countries.
• Burkina Faso saw Nm prevalence, while NmB became prominent alongside NmA elsewhere.

IV Trends & Notes

• Nigeria 2009: High number of alerts and active epidemic districts compared to previous years.
• Illness caused by NmB in areas like western and central African countries.

*Note: This summary includes only the essential information based solely on the provided text and tables.*