1. VC1C VC WASH Cluster – Emergency Training 1 Vector Control Module 1C Dengue

2. VC1C VC WASH Cluster – Emergency Training 2 Blood borne viral disease spread by the bite of aedis aegypti mosquito 2 forms: Dengue fever + Dengue Hemorrhagic Fever Up to 40% fatality in epidemics No drugs or vaccines that work! Dengue

3. VC1C VC WASH Cluster – Emergency Training 3 Thrives in close proximity to humans Transmitted by infected female mosquito Aedes : The efficient vector Often bites several people for one blood meal. Found mainly in urban and semi urban areas Lays eggs in artificial water containers Short flight range of about 200 meters Feeds preferentially on human blood

4. VC1C VC WASH Cluster – Emergency Training 4 Behaviour of mosquitoes GenusBreeding siteDisease and distribution Aedes aegypti mosquito Biting period : DAY Small water containers: Cans, jars, gutters Yellow fever : Africa and Americas Dengue : Africa and Americas, Asia Filariasis : Pacific Anopeline mosquito Biting period : NIGHT Non polluted water: Edges of rivers, swamps, tanks, rice fields, saltwater without wave action Malaria : Tropical and sub-tropical Filariasis : Asia and Africa

5. VC1C VC WASH Cluster – Emergency Training 5 Dengue

6. VC1C VC WASH Cluster – Emergency Training 6 Breeding Sites

7. VC1C VC WASH Cluster – Emergency Training 7 2003: 20 mega cities of > 10 mil. people; 75% developing world Emerging global threat

8. VC1C VC WASH Cluster – Emergency Training 8 Burden of Dengue/Dengue haemorrhagic fever world-wide reported to WHO

9. VC1C VC WASH Cluster – Emergency Training 9 Case study exercise Dengue, Burma Look at material Answer questions Feedback and discussion

10. VC1C VC WASH Cluster – Emergency Training 10 Dengue, Burma

11. VC1C VC WASH Cluster – Emergency Training 11

12. VC1C VC WASH Cluster – Emergency Training 12 Increased risk in Burma following Cyclone Nargis because of; –Overcrowded conditions –Fresh water was stored in unprotected containers –Debris permits water collection and forms breeding sites –Rural populations displaced to urban settings have lower herd immunity

13. VC1C VC WASH Cluster – Emergency Training 13

14. VC1C VC WASH Cluster – Emergency Training 14 Control Outdoor space spraying Larvicide