2008-12-27-世界卫生组织-Meningitis_Week_49-52,_1_December_2008_to_28_December_2008_12页_596kb

MDSC Meningitis Weekly Bulletin Summary

I. Epidemiological Situation Weeks 49-52 (01 Dec 2008):

• Cases increased, deaths rose by 11.1% compared to previous week.
• Highest districts: Niger (233 cases), Burkina Faso (387 cases), Mali (55 cases).
• Deaths: Niger (17), Burkina Faso (70), Mali (5), Chad (21).
• Mortality rates vary between 2.6% (Nigeria) and 11.4% (Chad).
• Alert/epidemic thresholds exceeded in Mali, Niger, and Burkina Faso. Mali's Ouélessebougou district reached epidemic status with an attack rate of 12.7%. Nigerian Mirriah district and Burkina Faso's Sapouy district are on alert.
• Laboratory-confirmed NmA in Niger and Mali, leading to vaccination campaigns.

II. Synthesis of Epidemiological Situation 2008:

• Cumulative cases: 33,381.
• Deaths: 3,276.
• Key statistics: High activity in Niger and Nigeria. Niger reported 3,757 cases and 246 deaths; Nigeria reported 6,835 cases and 492 deaths.
• Mortality rates highest in Chad and Niger (e.g., 25.8% in Central African Republic, 13.5% in Chad).
• Weakness in surveillance defined by lower completeness in some countries like Ghana and Guinea.

III. Pathogens Identified in 2008:

• NmA emerged prominently in outbreaks in Ouélessebougou (Mali) and Mirriah (Niger).
• Significant NmA cases in Niger (611), Chad (2), Togo (9), Mali (8), and Burkina Faso.
• Other pathogens noted: NmW135 in Niger and Mali, S. Pneumoniae, and Hib were less frequent or not detected in higher numbers.

IV. Broad Conclusions:

• Sub-district surveillance and laboratory confirmation help detect and respond to emerging epidemics quickly.
• High priority needed in countries with high activity and high mortality rates, like Nigeria, Chad, and Central African Republic.

Data is old and may not reflect current public health priorities or systems.