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Dengue and its causes,Symptoms and Prevention

Dengue and its causes


Dengue is a mosquito-borne viral disease.Dengue is transmitted by female infected mosquito.This mosquito also transmits chikungunya, yellow fever and Zika infection .Dengue is widespread throughout the regions.

Dengue Fever

Severe dengue (also known as Dengue Haemorrhagic Fever) was first recognized in 1950s during dengue epidemics in Philipines and Thailand.

Types Of Virus That Causes Dengue

There are four different types of virus that causes dengue.These are serotype of virus that causes dengue.

  1. DEN-1
  2. DEN-2
  3. DEN-3
  4. DEN-4

Recovery from any one infection will produce lifelong immunity against serotype.


  • High Fever
  • Sever Headache
  • Pain Behind the eyes
  • Muscle and Joint Pain
  • Nausea
  • Vomiting
  • Swollen gland or Rash

Warning Symptoms

  • Warning symptoms starts showing after three to seven days with a decrease in temperature 38 degree Celsius.

It includes:

  •  Severe abdominal Pain
  • Persistent vomiting
  • Rapid Breathing
  • Bleeding gums
  • Fatigue
  • Restlessness
  • Blood in Vomit

24 to 48 hour are critical time and it needs proper medical care to avoid from death.


The Aedes Ageypti mosquito primary source of dengue.The virus is transmitted to humans by the bites of infected female mosquito.After incubation of virus from 4 to 10 days mosquito is capable of transmitting the virus.Infected humans are the main carrier of virus.This virus may spread into other mosquito which were not having virus before.This mosquito attacks in day time.Peak biting period is early in morning and in evening before dusk.


In 2015 and early 2016, the first dengue vaccine was made by sanofi named Dengvaxia (CYD-TDV) and was used in several countries for use individuals with age 9 to 45 years in endemic areas.

Prevention and control

Up till now the main method to control the dengue virus is combat vector mosquito.

  • Preventing mosquito from understanding egg laying habitats by environmental management.
  • Disposing of solid waste
  • Cleaning water weekly
  • Apply insecticide to water storage out door containers
  • Using of personal house hold protection For example:Window screen, Full sleeved cloth,insecticide treated material,coils and vaporizers.
  • Apply insecticides as sprays.
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