DENGUE FEVER Dr. S. Rajendra Kumar Dept. Science & Humanities Mookambigai College of Engineering http://www.mosquitoage.org/Portals/12/Images/dengue%20virus_em.jpg
Dengue fever What did you know… VSWhat you need to know…
Contents1. What is dengue fever2. Distribution & History of dengue fever3. Symptoms of dengue fever4. Characteristics of the Aedes mosquito5. Life cycle of the Aedes mosquito6. How the Aedes mosquito transmit diseases7. Health issues due to dengue fever8. Treatment related to Dengue fever9. How to prevent the spread of dengue fever – Site Control
What is dengue fever? Dengue Fever is an illness caused byinfection with a virus transmitted by the Aedes mosquito. Dengue Fever (DF) and Dengue Haemorrhagic Fever (DHF) are the most common mosquito-borne viral disease in the world. It can be fatal.
Symptoms of Dengue FeverExample of a skin rash due to dengue fever
Dengue is a tropical febrile disease http://gamapserver.who.int/mapLibrary/Files/Maps/World_DengueTransmission_Extension_2008.png
Dengue Fever has a long history… www.philadelphia-reflections.com/topic/17.htm 992- Chinese Encyclopedia1780- Philadelphia “break-bone fever” Benjamin Rush
Isolated by Albert Sabin in 1944 http://www.notablebiographies.com/images/uewb_09_img0622.jp g
Spread of the vector and the disease go hand in handwww.latinamericanstudies.org/Transatlantic.htm Transatlantic Slave Trade World War II http://neatorama.cachefly.net/images/2007-09/world-war-2.jpg
…and become a MAJOR pandemic in the last 50 yearsEndemic in more than 1oo countries 2.5 billion people at risk www.tatterhood.com/category/gameart/tastyplanet
How is it spread?? http://www.metapathogen.com/IMG/Aedes-aegypti.jpgTHE VECTOR: Aedes aegypti
Characteristics of theAedes MosquitoOne distinct physicalfeature – black andwhite stripes on its bodyand legs. Bites during the day.Lays its eggs in clean,stagnant water and year Close-up of an Aedes mosquitoaround breadingFavourite zone – Tropical regions, Breedingtemperature 16 – 40o C
Do you know…Only the female Aedes mosquitofeeds on blood. This is becausethey need the protein found inblood to produce eggs. Malemosquitoes feed only on plantnectar.On average, a female Aedesmosquito can lay about 300 eggsduring her life span of 14 to 21days.
Life cycle of the Aedes Mosquito 21 days1-2 days Longevity, Fly range <1/2km Pupae Larvae Eggs 4-5 days 2-3 days Eggs Desiccation Stagnant water for and years
How Do Aedes Mosquitoes Transmit Diseases... Mosquito bites and sucks And passes the virus blood containing the virus to healthy people from an infected person. when it bites them. Virus is carried in its body. Aedes mosquitoes breeding… Dengue Virus infections …
Dengue PresentationEarly Stage Initially like other viral feverBut later………. Fever Rash Severe headache Musculoskeletal pains
Rare types of Dengue Brain fever Liver damage Heart damage Severe bleeding into stomach
What are the tests needed? Routine blood test Tests to check the clotting process Special tests to identify the Dengue or its foot marks in our blood Urine to check protein leak
Treatment of Dengue Supportive measures – Mosquito screen Avoid Aspirin and pain killers Steroids should not be used Plenty of water and salt are required Children below 12 require careful watch for dangerous form No antibiotics are of proven value
Can we protect ourselves? There is no vaccine available as yet But we can prevent the disease by preventing ourselves from mosquito bite
There is no specific treatment for DHF http://www.health-res.com/EX/08-01-15/82560-main_Full.jpg Can only treat the symptoms
How can we stop it? Mosquito control: Improved water storage – Physical Introduction of mosquito-eating fish – Biological Insecticides - Chemical
How can we stop it?1. Anti Larval Measures: Treating breading source with chemical larvicide “Temephos 50%” EC at the rate of 1ppm2.Anti Adult Measures: indoor and outdoor thermal fogging operation using 1 part of Pyrethrum 2% and 19 parts diesal. Out door: 60 litre of Pyrethrum, 114 litre diesal are mixed for fogging
Spread the dengue preventionmessage to others… Let your family, friends and neighbours know about the dangers of breeding Mozzies!!