2013-05-18-世界卫生组织-Meningitis_weekly_bulletin_13_-_19_May_2013_12页_577kb

Meningitis Weekly Bulletin Summary - Week 20, 2013

I. Epidemiological Situation for Week 20

• Total cases: 81
• Total deaths: 12
• Case fatality rate: 14.8%
• Key countries: Benin (8 cases), Burkina Faso (35 cases, 9 deaths, 25.7% lethality), Côte d'Ivoire (5 cases), Guinea (2 cases, 100% completeness), Mali (9 cases, 1 death, 11.1% lethality), Niger (4 cases, 2 deaths, 50.0% lethality), Senegal (9 cases), Togo (9 cases)
• Alert/epidemic districts: None for week 20
• Completeness: Ranges from 89.0% to 100.0% across countries

II. Synthesis from Week 1 to 20

• Cumulative cases: 9,254
• Cumulative deaths: 865
• Case fatality rate: 9.3%
• Comparison to 2012: Twice as many cases and deaths recorded in 2012 (18,818 cases, 1,593 deaths)
• Alert districts: 16 districts reported; 6 districts in epidemic
• Completeness: 61.0% for data

III. Laboratory Data Summary

• Lumbar穿刺 (LCR) samples collected: 2,084 out of 9,254 suspected cases (22.5%)
• Most common pathogens: Streptococcus pneumoniae (288 cases), W135 (173 cases)
• Other findings: Neisseria meningitidis serogroup A and C were frequently identified

IV. Comments

• Overall situation calm for week 20
• Case fatality rate remains high (14.8% for week 20, 9.3% cumulative), potentially due to inadequate management of sporadic cases