New Dengue Variant, DENV-2 Causing Severe Symptoms in Patients

Dengue fever caused by DENV-2 and DENV-4 are more dangerous.

Digital Health
2 min read
New Dengue Variant, DENV-2 Causing Severe Symptoms in Patients

Dengue fever is an acute viral fever that lasts up to 7 to 10 days and is caused when the mosquito Aedes bites a person.

The main characteristic of this mosquito is that it breeds in clean water unlike the malaria causing mosquito.

The species of mosquitoes involved are Aedes aegypti and Aedes albopictus. They are characterised by white stripes on a black body, also known as 'tiger mosquitoes.'

These mosquitoes breed in water accumulated around the house, coconut shells, water collected in tires and flower pots.


Types of Dengue Virus

Dengue is caused by Flavivirus, also known as dengue virus. It has four different types - DENV-1, DENV-2, DENV-3 and DENV-4. All four are called serotypes as each one of them has a different interaction with the antibodies present in the blood serum.

DENV-1 and DENV-2 are the predominant ones in India and type 3 cases are seen rarely in the southern parts of the country.

The symptoms of all the types are very similar. But the dengue fever caused by DENV-2 and DENV-4 are more dangerous as the person infected by these viruses may have many complications.

Fever caused due to one serotype provides immunity from that type for the whole life but the person is safe from other types of dengue viruses only for 3-4 months.

How are the Symptoms of DENV-2 Fever Different from DENV-1?

  • Patients infected by DENV-1 have redder eyes whereas the patients with joint pains and lower platelet count were found to be infected by DENV-2 virus.

  • The cases of DENV-2 virus haVE more complications than the patients infected by type 1 virus.

  • DENV-1 cases are more overt whereas DENV-2 and DENV-3 cases are the silent killers.

  • DENV-2 leads to severe stages of dengue like Dengue Hemorrhage Syndrome (DHS) and Dengue Shock Syndrome (DSS).

  • The symptoms of mild dengue fever include head ache, body ache, joint and muscular pain, disappearing and reappearing of rashes, fever, etc.

  • The symptoms caused by DENV-2 include- continuous vomiting, abdominal pain, high grade fever, weak pulse, restlessness, confusion, irritability, cold clammy skin, bleeding gums and nose.

  • Mild dengue cases are self limiting disease and can be taken care of at home whereas the patients infected by DENV-2 need to be under the observation of the doctor.

  • DENV-2 cases show severe symptoms and might lead to the death of the patient too.

DENV-2 causes severe symptoms in the infected patients and it is important that the people keep an eye on the warning signs, and consult a doctor without delay.

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