2009-08-01-世界卫生组织-Meningitis_Week_27-31,_29_June_-_2_August_2009_8页_552kb

Summary of MDSC Meningitis Bulletin: Week 27-31, 2009 and Annual Synthesis (2009)

Weekly Epidemiological Situation (Week 27-31, 2009)

• The epidemic situation remained calm across all countries under enhanced surveillance.
• Total cases reported: 1,598, with 134 deaths, resulting in a case fatality rate of approximately 8.4%.
• High case fatality rates observed in specific countries: Benin (0.0%, no cases), Burkina Faso (10.6%), Cameroon (50.0%), Cote d'Ivoire (0.0%, no deaths), Ethiopia (21.0%), Mali (7.1%), Niger (5.3%), Nigeria (-, incomplete), RD Congo (10.5%), Tchad (7.3%), Togo (14.3%).
• Pathogens: Only NmW135 and other unspecified pathogens were mentioned, with discrepancy definitions noted for countries outside the meningitis belt.
• Observation: The situation was generally stable, but data completeness was noted, especially in week 31 for some districts.

Annual Synthesis (Up to Week 31, 2009)

• Cumulative data for 2009: Total cases exceeded 80,900, with over 4,400 deaths and a case fatality rate of around 5.5%.
• Only 5 out of 13 countries submitted complete data, highlighting data collection gaps in other nations.
• Key concern: The case fatality rate remained high for many countries, with most countries having rates exceeding 10%.

Pathogen Identification Findings

• Laboratory tests via PCR, LATEX, and culture: 46% of samples tested positive, with several countries, including Niger and RD Congo, showing high numbers but limitations in pathogen reporting.
• Encouragement: Countries are urged to improve data collection and analysis for better epidemic tracking, while noting low positivity during off-peak periods.

General Notes

• Mortality rates and incomplete data submissions are primary issues requiring attention.
• Graphics sections indicate potential data visualization, but no figures provided in text. Trends over two years suggest ongoing monitoring needs.