7. EPIDEMIOLOGY
• Dengue remained a relatively minor, geographically restricted
disease until the middle of the 20th century.
• The coincidental transport of Aedes mosquitoes around the
world in cargo are thought to have played a crucial role in the
dissemination of the viruses.
• The first reported epidemic of Dengue Fever occurred in
1779-1780 in Asia, Africa and North America.
• Worlds largest known epidemic of DHF/DSS occurred in
Cuba in 1981, with more than 116,000 persons hospitalized
and as many as 11,000 cases reported in a single day.
8.
9. INTRODUCTION
• Dengue fever, also known as break bone fever, is a
mosquito-borne viral infection that causes a severe flu-like
illness.
• The virus is transmitted by female mosquitoes mainly of the
species
• Aedes aegypti and
• to a lesser extent A. albopictus.
10. TRANSMISSION
• The female infected Aedes aegypti mosquito is the primary
vector for transmitting dengue viruses.
11.
12. MOSQUITO
• The Aedes aegypti mosquito lives in urban habitats and
• Lays its eggs in clean stagnant water
13.
14. DENGUE VIRUS
• There are 4 distinct, but closely related, serotypes of the
virus that cause dengue
• DEN-1,
• DEN-2,
• DEN-3 ,
• DEN-4.
16. DENGUE VIRAL INFECTION
• Dengue viruses are capable of infecting and causing
diseases.
• These infections may be symptomatic or may lead to
• CLASSICAL dengue fever
• Dengue hemorrhagic fever without shock
• Dengue hemorrhagic fever with shock
17.
18. DHF
• This can cause:
• Bleeding from the nose and mouth
• Severe abdominal pain
• Persistent vomiting
• Bleeding under the skin, which might look like bruising
• Problems with your lungs, liver and heart
19.
20. DIAGNOSIS
• The virus is present in the blood during febrile stage.
• It can be isolated from blood by serology test.
• Tests that may be done to diagnose this condition include:
• Antibody titer for dengue virus types
• Complete blood count (CBC)
• Polymerase chain reaction (PCR) test for dengue virus
types
• Liver function tests
21. TREATMENT
• There is no specific treatment for dengue fever.
• For severe dengue, medical care by physicians and nurses
experienced with the effects and progression of the
disease can save lives.
• For typical dengue, treatment is purely concerned with
the relief of symptoms.
22. • If you start to feel worst in the next 24 hours after the
fever subsides , rush to the hospital for complications to
be checked.
