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Dengue – Causes, Signs and Symptoms, Risk factors.

Dengue is transmitted by the bite of an Aedes mosquito infected with any one of the four dengue viruses. Dengue fever can occur to people of all ages but it mostly affects children under the age of 15 years, but can occur in all age groups. It is also known as breakdown fever.

It is found mostly during and shortly after the rainy season in tropical and subtropical areas of Africa, Southeast Asia and China, India, Middle East, Caribbean and Central and South America, Australia and the South and Central Pacific. The dengue virus is transmitted to its host during probing and blood feeding.

Causes of Dengue Fever

– It is caused by one of four closely related virus serotypes (DEN-1, DEN-2, DEN-3, and DEN-4), of the genus Flavivirus.
– Increase in non-biodegradable plastic packaging and discarded tires.
– Increased jet air travel is helping people infected with dengue viruses to move easily from city to city.
– Lack of effective methods to control epidemics.
– Lack of effective mosquito control efforts.
– Poor Public health systems.
– Rapid growth or Overcrowding of cities in tropical countries.
– Urban decay, and substandard sanitation, allowing more mosquitoes to live closer to more people.

Signs and Symptoms of Dengue

After the mosquito carrying the virus has bitten a person the symptoms generally starts within 5 to 8 days. The acute phase of illness can last for 1 week followed by a 1 to 2 week period of recovery period.
– Mild fever, to incapacitating high fever upto 105 degrees.
– Rashes
– Headache
– Redness and pain in eyes
– Joint and muscle pain
– Nausea and vomiting
– Loss of appetite
– Change in taste
– Swollen lymph nodes

Who is at a high risk of having dengue?

– Anyone who is bitten by an infected mosquito can get Dengue fever.
– Risk factors for Dengue hemorrhagic fever include a person’s age and immune status.
– It also depends on type of infecting virus.

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