Incubation period of 2-6 days
No symptoms or flu-like illness (fever, myalgias, joint pain, headache)
Early disease can be mistaken for meningitis with occasional neck stiffness and sensitivity to light
Resolves within 1 week
Occular form- 0.5-2% of patients
Mild disease form + retinal lesions, blurred and decreased vision
Retinal lesions occur 1-3 weeks after disease onset and last 10-12 weeks
50% of patients with macular lesions will develop permanent vision loss
Meningoencephalitis form- <1% of patients
Severe headache, memory loss, hallucinations, confusion, vertigo, seizures, coma, and late neurological complications
Onset is 1-4 weeks after mild symptoms
Residual severe neurological deficits are common
Hemorrhagic fever form- <1% of patients
Jaundice is first sign due to liver dysfunction
Hemorrhage (vomit, stool, gums, menorrhagia), purpuric rash, echymosis
Onset is 2-4 days after illness, death in 3-6 days
Most fatalities from<unk> , 50% fatality rate
Mild disease form + retinal lesions, blurred and decreased vision
Retinal lesions occur 1-3 weeks after disease onset and last 10-12 weeks
50% of patients with macular lesions will develop permanent vision loss
Severe headache, memory loss, hallucinations, confusion, vertigo, seizures, coma, and late neurological complications
Onset is 1-4 weeks after mild symptoms
Residual severe neurological deficits are common
Jaundice is first sign due to liver dysfunction
Hemorrhage (vomit, stool, gums, menorrhagia), purpuric rash, echymosis
Onset is 2-4 days after illness, death in 3-6 days
Most fatalities from<unk> , 50% fatality rate
Rift valley fever
Normal causes of acute fever!
Chikungunya
Malaria
Yellow fever
Dengue
Leptospirosis
Typhoid fever