2013-03-02-世界卫生组织-Meningitis_weekly_bulletin_25_February_-_3_March_2013_12页_1mb

Meningitis Weekly Bulletin Summary

I - Epidemiological Situation (Week 09 - 25 Feb to 03 Mar 2013)

• Notifiable Countries (20): Benin, Burkina Faso, Cameroon, Central African Republic, Côte d'Ivoire, Ethiopia, Ghana, Guinea, Gambia, Mali, Mauritania, Niger, Nigeria, Rwanda (DRC), Senegal, South Sudan, Sudan, Chad, Togo

• Key Countries with Cases:

  • Burkina Faso: 194 cases, 31 deaths, 16% lethality
  • Benin: 38 cases, 2 deaths, 5.3% lethality
  • Chad: 22 cases, 5 deaths, 22.7% lethality
  • Ghana: 26 cases, 2 deaths, 7.7% lethality
  • Cameroon, Central African Republic, Guinea, Nigeria had zero cases.

• Alert/Epidemic Districts:

  • Three districts reached alert thresholds: Benin's Tanguiéta (AR: 7.8), Burkina Faso's Garango (AR: 6.7), Chad's Goundi (AR: 6.2). No districts were in epidemic status.

• Overall Summary for Week 09:

  • Total cases: 332
  • Deaths: 43
  • CFR: 13%

• Completeness: Varies greatly, averaging 28.2%.

II - Synthesis of Epidemiological Situation (Weeks 01–09)

• Cumulative Cases by Country:

  • Republic of Congo (DRC): Highest cumulative cases (3790) & fatalities (388), 10.2% CFR.
  • Benin, Burkina Faso, Chad, Ghana, Togo had fully vaccinated populations; Cameroon, Central African Republic, etc., partially vaccinated.

• Status of Vaccination:

  • T: Entirely vaccinated
  • P: Partially vaccinated
  • Alert/Epidemic status: Burkina Faso had 936 cases, one district at alert status.

• Completeness & Deaths Reporting:

  • Countries showed varying reporting completeness and case fatality rate (CFR) consistency.

III - Laboratory Data (Weeks 01–09 - 2013)

• CSF Specimen Collection:

  • 819 CSF samples were submitted, representing 21.6% of cases.

• Main Pathogens:

  • Streptococcus pneumoniae (Spn): Highest at 65 cases.
  • Others reported: Neisseria meningitidis (Nm), Haemophilus influenzae type B (Hib).

• Lab Confirmation Limitations:

  • Poor pathogen confirmation rates despite vaccination efforts.

IV – Key Observations

• Streptococcus pneumoniae predominates in lab-confirmed cases.
• High case fatality rates (CFR) observed in several countries.
• Challenges in early case detection and laboratory confirmation persist.
• Surveillance data completeness remains a concern.

Note: Graphs show case trends for previous weeks and years. Contact information provided below for inquiries:

• Email: walkero@bf.afro.who.int, djingareym@bf.afro.who.int, or linganic@bf.afro.who.int
• Phone: (226) 50-30-65-65
• Web site: meningvax.org