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close this bookCommunicable Diseases Following Natural Disasters - Risk Assessment and Priority Interventions (WHO; 2006; 19 pages) View the PDF document
View the documentAcknowledgements
View the documentIntroduction
open this folder and view contents1. Assessing the risk of communicable diseases
View the document2. Dead bodies and the risk of communicable diseases
close this folder3. Prevention of communicable diseases following natural disasters
View the document3.1 Safe water, sanitation, site planning
View the document3.2 Primary health-care services
View the document3.3 Surveillance/early warning system
View the document3.4 Immunization
View the document3.5 Prevention of malaria and dengue
View the document4. Disaster preparedness plans and control of communicable diseases
View the documentReferences
View the documentAppendix 1

3.5 Prevention of malaria and dengue

• Specific preventive interventions for malaria must be based on an informed assessment of the local situation, including on the prevalent parasite species and the main vectors.

• An increase in mosquito numbers may be delayed following flooding, allowing time for implementation of preventive measures such as indoor residual spraying of insecticides, or the re-treatment/distribution of insecticide-treated nets preferably long-lasting insecticidal nets (LLIN) in areas where their use is wellknown and accepted.

• Early detection of a possible malaria outbreak can be enhanced by monitoring weekly case numbers must be part of the surveillance/early warning system.

Periodic laboratory confirmation of rapid test-positive fever cases is recommended to track the slide/test positivity rate.

• Treatment with artemisinin-based combination (ACT) therapy should be provided free of charge to the user in disaster-affected areas with falciparum malaria. An active search for fever cases may be necessary to reduce mortality.

• For dengue, the main preventive efforts should be directed towards vector control.

Social mobilization and health education of the community should emphasize elimination of vector breeding sites as much as possible, specifically by:

- continuous covering of all stored water containers;
- removal or destruction of solid debris where water can collect (bottles, tyres, tins, etc.).


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