2010-03-13-世界卫生组织-Meningitis_Week_10,_8-14_March_2010_9页_756kb

MDSC Meningitis Weekly Bulletin - Week 10, 2010 Summary

Epidemiological Situation Week 10 (8-14 March 2010)

• Total cases: 814, deaths: 77, lethality rate: 9.5%.
• Alert and epidemic thresholds exceeded in countries including Benin, Burkina Faso, Cameroon, Ghana, Mali, Nigeria, Chad, and Togo.
• Notable alerts: Burkina Faso (Séguenega district in epidemic phase), Chad (Doba and Dono-Manga districts in epidemic phases), Nigeria (one district alert), and Ghana (Bongo district in epidemic).
• Benin reported high lethality (33.3%), with Tanguiéta district alert. Burkina Faso showed a district with high attack rate (5.5 cases per 100,000).

Cumulative Synthesis (Weeks 1-10)

• Total cases: 7,946, deaths: 971, lethality rate: 12.2%.
• Countries most affected: Burkina Faso (2,520 cases, 378 deaths, 6 districts exceeding thresholds) and Chad (1,262 cases, 130 deaths, 5 districts exceeding thresholds).
• Nigeria reported 15,170 cases but only one district in epidemic, with low lethality (7.0%). Togo had one district in alert with 24.6% lethality.

Pathogens Identified

• Primary pathogens: Neisseria meningitidis A (predominant), followed by Streptococcus pneumoniae and Haemophilus influenzae type b (Hib).
• Notable circulation: NmW135 in Niger, Chad, and northern Ghana; PCR identified pathogens in most cases, with high counts from Nigeria and Chad.

Additional Notes

• Laboratory methods (PCR, LATEX, culture) detected pathogens, with no data constraints noted for countries outside the meningitis belt.