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Start free with EleplanRift valley fever
ORPHA:319251Disease
What it is
Rift Valley fever (RVF), caused by the Rift Valley fever virus (RVFV), is an arbovirus characterized by a usually self-limiting febrile illness but that in some cases can also manifest with thrombosis, vision loss, hemorrhages and/or neurological symptoms.
Key facts
- Prevalence
- <1 / 1 000 000 (annual incidence, Europe)
- Age of onset
- All ages
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Sometimes5–29%
11- Abnormality of the eye
- Increased circulating IgM level
- Muscle weakness
- Ocular pain
- Periodic fever
- Photophobia
- Reduced visual acuity
- Retinal hemorrhage
and 3 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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