Dengue fever

Dengue viruses are transmitted by mosquitoes, which are most active during the day. These vector mosquitoes are found near human habitations and are often present indoors. Epidemic transmission is usually seasonal, during and shortly after the rainy season.

Occurrence: Dengue occurs at many destinations in the tropical countries in the cities or the suburbans, primary in South-East-Asia and in South- America. Destinations with dengue risk.

Manifestations: Dengue fever is characterised by sudden onset:

• High fever
• Severe headaches
• Joint pain
• Muscle pain
• Nausea/vomiting,
• Rash. The rash may appear 3–4 days after the onset of fever
• Haemorrhages
• Shock

Diagnose and treatment: Infection is diagnosed by a blood test that detects the presence of the virus or antibodies. The illness may last up to 10 days, but complete recovery can take 2–4 weeks. Dengue is commonly confused with other infectious illnesses such as malaria, typhoid, leptospirosis, and scarlet fever. The symptoms of dengue can be treated with bed rest, fluids, and medications to reduce fever, such as acetaminophen; aspirin should be avoided.

Prevent Dengue by:

1. Avoid mosquito bites by remaining in well screened areas
2. Avoid mosquito bites by remaining in air-conditioned areas.
3. Use mosquito repellents on skin and clothing,
   Bring aerosol insecticides to use indoors
4. Use bednets

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