vector : Aedes aegyptii mosquito ; no animal reservoir
Cycle of infection : Man- Mosquito-Man ; Incubation period: 2 to 12 days
HISTORY
First isolated from human patients from Tanzania in 1952
first appeared in India in 1963
SYNONYMS
CHIK Fever; Buggy creek virus infection; Knuckle fever, Me Trivirus infection,
Semliki Forest virus infection
SYMPTOMS
Sudden onset of fever, chills, Lymphadenopathy, Headache, Nausea, Abdominal pain, Joint pain, Low back pain & Rash
CLINICAL FEATURES
Viremia for 5 days; Biphasic fever with remisssion after 6 days; high grade fever; Arthralgia lasting several weeks
LAB DIAGNOSIS
1)Four fold or more rise of HI Antibody 2) IgM capture ELISA using MAbs 3) Indirect Immuno Flourescence
Test (I IFT) On infected cells from tissues 4) Virus Isolation – Infant Swiss Albino mice Vero BHK-21 cell
lines are used 5) Nucleic acid amplification by PCR & RT PCR
TREATMENT
1)Rest to the patient and mild movements of joints 2)Cold compresses to inflamed joints 3) Liberal fluid
intake or IV fluids Analgesics and NSAIDS Paraetamol ± Ibuprofen or aceclofenac or diclofenac
Naproxen sodium (Naprasyn, Xenobid) Aspirin should be avoided Hydroxy chloroquine sulphate
(HCQS) 200 mg/od Chloroquine phosphate 250 mg/od