Oroya fever

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Oroya fever

ORPHA:659756Clinical subtype

What it is

A rare bacterial infectious disease characterized by severe acute hemolytic anemia, fever, malaise, myalgia, headache, tachycardia, jaundice, and hepatomegaly occurring around 60 days after the bite of a sand fly infected with Bartonella bacilliformis. Complications are common and include secondary infections and cardiovascular and neurological problems. Fatality rates are high without antimicrobial intervention.

Key facts

Inheritance
Not applicable
Classified as
Clinical subtype

ICD-10 codes

A44.0filed under a broader ICD-10 category — shared with 1 other rare disease

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Cross-references

MONDO 0018984UMLS C0029307

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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