Case Definition of Chikungunya Fever
Suspect Case of CHK
- Acute onset
- High fever of less than 7 days duration
- Severe headache
- Severe Arthralgia
- With or without rash
- Suspect case of CHK
- High vector density
- Presence of confirmed case of CHK in the area
Isolation of virus from blood in early phase
Serological test for IgM antibody after 5th day of illness
Demonstration of 4 fold or greater rise in IgG antibodies in paired sera
Who is Commonly Affected?
The disease affects all age groups.