Dengue Fever is an infectious disease caused by a virus commonly prevalent in tropical and sub-tropical nations. It is widely transmitted by the bite of Aedes aegypti mosquito. It is a febrile condition, which has become an international health concern because of its rapid spread. A large number of deaths occurring among children are attributed to dengue in many Asian countries.
Four virus types cause dengue. The lethal DHF was first identified in 1950 in Thailand and Philippines.
Dengue fever was formerly known as break bone fever on account of extreme joint and muscle pain experienced during the course of illness.
The mosquito bites and transmits the virus in a susceptible host. One bite of Aedes mosquito is sufficient to inflict the disease. Usually, the female Aedes is a carrier and transmits the virus from one host to another. It is seen that this mosquito bites during the daytime. The female Aedes bites the infected person and gets the virus, which after incubation period of 8-10 days becomes capable to get transmitted to the other individual, again via mosquito bite.
Dengue virus is not at all contagious and never spreads by contact with each other. The only route of infection is person-to-mosquito-to-another-person. It is commonly seen to occur during or shortly after the rainy season because the environment favors rapid mosquito growth.
Dengue Fever: Synonyms
The significant and popular alternative names of dengue fever are:
Ø Breakbone Fever
Ø Dandy Fever
Ø Aden Fever
Ø Bouquet fever
Ø Date Fever
Ø Polka Fever
Ø Dengue Haemorrhagic Fever
Ø Exanthesis arthrosia
Ø Scarlatina rheumatica
Ø Solar fever
Dengue fever: Classification/Types
Classification of dengue fever:
The important types of the fever are listed as under:
v Dengue Haemorrhagic Fever (without shock)
v Dengue Shock Syndrome
Dengue Haemorrhagic Fever (DHF)
The condition is very common in south-east Asia. It is characterized by fever, bleeding may occur with petechiae (red or purple blisters under the skin), ecchymoses, epistasis, and melaena. It is a potentially serious complication which may prove to be lethal. Enlargement of liver and failure of blood circulation is also seen in severe cases.
(DHF) is life threatening and may precipitate as dengue shock syndrome.
Dengue Shock Syndrome (DSS)
In addition to the symptoms similar to that of DHF, here shock is also manifested by rapid and weak pulse and hypotension.