Dengue mce 21_11_2012


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Dengue mce 21_11_2012

  1. 1. DENGUE FEVER Dr. S. Rajendra Kumar Dept. Science & Humanities Mookambigai College of Engineering
  2. 2. Dengue fever What did you know… VSWhat you need to know…
  3. 3. 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
  4. 4. 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.
  5. 5. Symptoms of Dengue FeverExample of a skin rash due to dengue fever
  6. 6. Dengue is a tropical febrile disease
  7. 7. Dengue Fever has a long history… 992- Chinese Encyclopedia1780- Philadelphia “break-bone fever” Benjamin Rush
  8. 8. Isolated by Albert Sabin in 1944 g
  9. 9. Spread of the vector and the disease go hand in Transatlantic Slave Trade World War II
  10. 10. …and become a MAJOR pandemic in the last 50 yearsEndemic in more than 1oo countries 2.5 billion people at risk
  11. 11. How is it spread?? VECTOR: Aedes aegypti
  12. 12. Characteristics of theAedes MosquitoOne 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 breadingFavourite zone – Tropical regions, Breedingtemperature 16 – 40o C
  13. 13. 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.
  14. 14. 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
  15. 15. 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 …
  16. 16. Dengue PresentationEarly Stage  Initially like other viral feverBut later……….  Fever  Rash  Severe headache  Musculoskeletal pains
  17. 17. Dengue Presentations
  18. 18. Dengue Presentations - Dengue Hemorrhagic Fever (DHF) / Dengue Shock Syndrome (DSS) Symptoms:  Plasma leakage  Hepatomegaly  Low blood pressure Hypovolemic shock Death
  19. 19. Dengue Presentation - Bleeding from where? Bleeding into skin From Gums From Nose Into our food passages Blood in urine
  20. 20. Skin bleeds
  21. 21. Bleeding into the eye
  22. 22. Large bleed into skin
  23. 23. Rare types of Dengue Brain fever Liver damage Heart damage Severe bleeding into stomach
  24. 24. 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
  25. 25. 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
  26. 26. Can we protect ourselves? There is no vaccine available as yet But we can prevent the disease by preventing ourselves from mosquito bite
  27. 27. There is no specific treatment for DHF Can only treat the symptoms
  28. 28. Aedes mosquito Breeding sites
  31. 31. Prevent Aedes from Breeding! Remove ALL sources of stagnant water. Deny the Aedes mosquito of any chance to breed.
  32. 32. Angry VHN in action- enemy homeunder attack
  33. 33. Appears to be complex problem-but solutions are simpler
  34. 34. Keep the unused grinder stone upsidedown – Encourage to use as a sittingstone
  35. 35. Washing with bleaching powderor ash and a brush
  36. 36. Lock the concrete mixer inupside down position after work
  37. 37. Covered with cloth
  38. 38. All plastic wastes are removed
  39. 39. Drilled on allsides
  40. 40. How can we stop it? Mosquito control:  Improved water storage – Physical  Introduction of mosquito-eating fish – Biological  Insecticides - Chemical
  41. 41. 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
  42. 42. Spread the dengue preventionmessage to others… Let your family, friends and neighbours know about the dangers of breeding Mozzies!!
  43. 43. Thank you