Lecture 9 dengue fever
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Lecture 9 dengue fever






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Lecture 9 dengue fever Presentation Transcript

  • 1. Health Education- Dengue Fever Miss Chantelle Chaudoin MPH
  • 2. Definition
    • Dengue is a severe viral disease transmitted by the bite of the mosquito and caused by any of 4 dengue virus serotypes.
      • Den-1, Den-2, Den-3, Den-4
    • Dengue Fever is a severe flu like illness that affects infants, young children, and adults, but seldom causes death.
    • Dengue Heamorrhagic Fever (DHF) is a more severe form in which bleeding and sometimes shock occurs leading to death. It is most serious in children. Symptoms of bleeding usually occur after 3-5 days of fever.
  • 3. Clinical Manifestation
    • Dengue Fever
      • Acute febrile disease with headache.
      • Muscular and joint pains.
      • Rash
      • Leukopenia
      • Mild thrombocytopenia
      • Nausea or vomiting
    • Dengue Heamorrhagic Fever (DHF)
      • Symptoms similar to Dengue Fever plus any of the following:
      • Hepatomegaly
      • Circulatory failure and splenomegaly is infrequently noticed in infants.
      • High fever greater than 39 degrees Celsius and remains for 2-7 days
      • Heamorrhagic Manifestation:
        • Bleeding from the nose, mouth and gums
        • Gastrointestinal bleeding: black stools like coal, tar.
        • Petechiae
  • 4. Treatment
    • Oxygen therapy
    • Rapid replacement with fluid and electrolyte solution.
    • Plasma should be used for patients with severe cases of shock.
    • Blood transfusion for patients who have severe bleeding.
    • Avoid use of aspirin and ibuprofen because it can increase bleeding and cause stomach pain.
    • If one or more signs of DHF are seen, take the patient to the hospital immediately, give fluids to drink while transferring the patient to the hospital.
  • 5. Disease Transmission
    • Dengue is spread by the bite of an infected mosquito, specifically Aedes Aegypti and Aedes Albopictus.
    • The mosquito gets the virus by biting and infected person.
    • The first symptoms of the disease occur about 5-7 days after an infected bite.
    • The virus enters the midgut, multiplies and spreads to other mosquito organs including the salivary glands. It takes 8-10 days to complete this process.
    • There is no way to tell if a mosquito is carrying the virus, therefore, people must protect themselves from all mosquito bites.
  • 6. Where does the mosquito live?
    • The mosquito rests indoors in closets and other dark places.
    • Outside, the rest where it is cool and shaded.
    • The female mosquito lays her eggs in water containers in and around homes, schools, and other areas around towns or villages. These eggs become adults in about 10 days.
    • The larvae hatch from the mosquito eggs and survive in the water for around a week. Then, they become a pupa stage for one or two days, after which the adult mosquito emerges ready to bite.
  • 7. Where does the mosquito breed?
    • Dengue mosquitoes breed in stored, exposed water collections.
    • Favored breeding places are: barrels, drums, jars, pots, buckets, flower vases, plant saucers, tanks, discarded bottles, tins, tires, water coolers, etc. And any place where rain water collects or is stored.
  • 8. Prevention of Dengue
    • Eliminate the mosquitoes and their breeding places.
    • Prevent mosquito bites
    • Dengue mosquitoes bite during the day time, protect yourself from the bite by:
      • wearing full sleeved clothes and long dresses to cover the limbs
      • Repellent – especially on children and the elderly.
      • Mosquito nets
      • Protection of people sick with dengue
  • 9. Prevention of Multiplication of Mosquitoes
    • Drain water from coolers, tanks, barrels, drums, buckets, etc.
    • Remove all objects, such as plant saucers, etc. which have water collected in them from house.
    • Cover all water containers at all times.
    • Discard solid waste and objects where water collects: bottles, tins, tires, etc.
  • 10. Questions
    • What are the 2 types of mosquitoes that transmit Dengue Fever?
    • What are the symptoms of Dengue Fever?
    • How long does it take for eggs to become adults?
    • Where do mosquitoes breed?
    • How can we protect ourselves from bites of mosquitoes?
    • How can we prevent mosquitoes from multiplying?