Dengue Fever- Symptoms, diagnosis, treatment and prevention. Dengue fever also known as breakbone fever or Dandy fever is a viral disease occurring in tropical and subtropical areas.It is caused by dengue virus, which belongs to family Flaviviridae and is transmitted by mosquito bite. It is an endemic disease in tropical countries like India with peaks seen during rainy season. There are 4 known serotypes of the virus named as DENV1, DENV2, DENV3 and DENV4. Infection by one serotype does not confer immunity to another type. Aedes aegypti Symptoms of Dengue fever Common symptoms include high grade fever, headache, rash (appearing between 2nd and fifth day of fever), weakness, vomiting, muscle and joint pain. Approximately 1 in 20 patients progress into severe forms of the disease namely Dengue hemorrhagic fever and dengue shock syndrome which can be life threatening. When to suspect?? Fever with any of the aforementioned symptoms of dengue fever. If