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dengue fever.pptx
- 1. dengue fever BY:- NARENDRA PAL PHYSIO.
- 2. Introduction Dengue fever also known as break bone fever . Is an infection tropical disease caused by the dengue virus. Dengue is endemic in more then 110 countries . It infects 50-100 million people world wide a year, leading to half a million hospitalization and approximately 12500-25000 death . Dengue has become a global problem since the second world war and is endemic in more then 110 countries. Dengue fever virus (DENV) is an (RNA) virus of the family Flaviviridae , Genus flavivirus There are four type of virus , which are called SEROTYPES .
- 3. transmission Dengue is transmitted by several species of mosquito with in the genus added and principally A. aegypti. An infection can be acquired via a single bite . A female mosquito that takes a blood meal from a person infected with dengue fever becomes it self infected with the virus the cells lining(endothelial cells)its guts. About 8-10 days in later, the virus spreads to other tissue including the mosquito salivary gland and subsequently released in its saliva.
- 4. mechanism When a mosquito carrying dengue virus bites a person. The virus enter the skin together with the mosquitos saliva. In severe infection , the virus production inside the body is greatly increased and many more organs.(such as the liver and the bone marrow) can be affected.
- 7. Sign and symptoms Asymptomatic or mild symptoms such as an uncomplicated fever (80%) More severe illness (5%) In small proportion it is life threating The incubation period(time between exposure and on set of symptoms ) ranges from 3-14 days but most often it is 4-7 days. Headache Sudden on set fever . Muscle and joint pains, and a rash Dengue haemorrhagic fever Resulting in bleeding ,low levels of blood platelets. Dengue shock syndrome (low BP).
- 9. Warning sign Abdominal pain Ongoing vomiting Lever enlargement mucosal bleeding Lethargy
- 10. diagnosis Physical examination Dengue fever rapid test Low blood cell count C.B.C. IgG and IgM
- 11. management P.C.M. for fever Oral rehydration therapy Intravenous fluid Blood transfusion
- 12. prevention Reducing open collection of water through environmental modification. People can prevent mosquito bites by wearing clothing that fully covers skin.