9. Dengue fever Flashcards
1
Q
Which organism causes dengue fever?
A
Dengue virus (most common arbovirus, 4 serotypes)
2
Q
Where is dengue fever endemic?
A
Africa, Asia, Indian SC
3
Q
How is dengue virus transmitted?
A
Aedes aegypti mosquito
4
Q
Which investigations indicate dengue fever?
A
Investigations usually normal
Diagnosed via dengue PCR and dengue serology (IgM)
5
Q
What is the incubation period for dengue fever?
A
3-14 days
6
Q
What are the signs and symptoms of dengue fever?
A
1st infection ranges from asymptomatic to severe febrile illness. symptoms last 1-5 days and improves 3-4 days after rash
Symptoms:
1. headache and myalgia
Signs:
- fever
- widespread maculopapular rash
7
Q
How is 1st infection with dengue fever treated?
A
supportive only
8
Q
What does re-infection with a different dengue virus serotype cause?
A
antibody-dependent enhancement:
- dengue haemorrhagic fever
- dengue shock syndrome (with non-blanching petechial rash)
