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Dengue hemorrhagic fever



Dengue hemorrhagic fever:

Dengue hemorrhagic fever is a severe, potentially deadly infection spread by certain species of mosquitoes (Aedes aegypti).
-Four different dengue viruses are known to cause dengue hemorrhagic fever. Dengue hemorrhagic fever occurs when a person catches a different type dengue virus after being infected by another one sometime before. Prior immunity to a different dengue virus type plays an important role in this severe disease.

Symptoms:

Early symptoms of dengue hemorrhagic fever are similar to those of dengue fever, but after several days the patient becomes irritable, restless, and sweaty. These symptoms are followed by a shock -like state.
-Bleeding may appear as tiny spots of blood on the skin (petechiae) and larger patches of blood under the skin (ecchymoses). Minor injuries may cause bleeding.

Tests:

-Arterial blood gases
-Electrolytes
-Hematocrit
-Liver enzymes
-Platelet count
-Serologic studies (demonstrate antibodies to Dengue viruses)
-Serum studies from samples taken during acute illness and convalescence (increase in titer to Dengue antigen).

Prevention
There is no vaccine available to prevent dengue fever. Use personal protection such as full-coverage clothing, netting, mosquito repellent containing DEET, and if possible, travel during periods of minimal mosquito activity. Mosquito abatement programs can also reduce the risk of infection.

Saadia
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