Introduction (What is Dengue?)
- Dengue fever is an infectious disease caused by a group of virus belongs to the genus flavivirus
- Transmitted by female Aedes
mosquitoes.
Global Scenario
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No.of countries experienced DHF epidemics
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During epidemics, attack rates vary from 40-50%, and may reach up to 80-90%
- 500 000 cases of DHF require hospitalisation and at least 2.5% of cases die, every year.
Indian Scenario:
In India DHF is the leading cause of hospitalization and death among children.
Dengue virus was first isolated in India in 1945.
Aedes aegypti is the principal vector of Dengue.
The number of Dengue cases ranges from 7-16 thousand per anum.
A maximum of 2,17,996 cases were recorded in the year 1986.
Dengue Indcidence and Death in India (1974-2002)
Dengue Outbreaks in the capital
| Year | Virus Type | Symptoms of DHF/DSS |
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| 1967 | Den 2 | NO |
| 1970 | Den 1 & Den 3 | NO |
| 1982 | Den 1, Den 2 | NO |
| 1988 | Den2 | Yes |
| 1996 | Den2 | yes |
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