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

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Presentation transcript:

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

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

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

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

VC1C VC WASH Cluster – Emergency Training 5 Dengue

VC1C VC WASH Cluster – Emergency Training 6 Breeding Sites

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

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

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

VC1C VC WASH Cluster – Emergency Training 10 Dengue, Burma

VC1C VC WASH Cluster – Emergency Training 11

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

VC1C VC WASH Cluster – Emergency Training 13

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

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