What should you know about oroya fever?

Oroya fever is the acute phase of infection with Bartonella bacilliformis, a bacterium associated with sand-fly exposure in parts of the Andes. It can damage red blood cells, causing pallor, weakness, headache, breathlessness on exertion, or a fast heartbeat. Fever may be accompanied by chills and reduced appetite. The illness can be mistaken for other infections, including Brucellosis, Acute Bronchitis, or COVID-19, so travel history and insect exposure are useful clues. A clinician may request blood tests to look for infection and anaemia; diagnosis should not be made from fever alone.

Contact a healthcare professional promptly if fever or unusual weakness develops after travel or residence in a region where the infection occurs. Mention dates, locations, insect bites, outdoor activities, medicines, and any pregnancy or immune-system concerns. Treatment requires clinician-selected antibiotics and follow-up, especially when anaemia or another complication is suspected. Until assessed, rest, drink fluids if able, avoid strenuous exertion, and prevent further bites with long sleeves, screens, and an appropriate repellent.

Seek urgent care for fainting, confusion, severe breathlessness, chest pain, a very fast heartbeat at rest, inability to drink, or rapidly worsening weakness. A child who is unusually sleepy, pale, difficult to wake, or breathing hard needs immediate assessment. Fever with a spreading painful skin lesion, severe dehydration, or signs of Cellulitis also warrants prompt review. Do not delay care while trying to identify the infection from symptoms alone.

Ask whether your travel and exposure history fit Oroya fever, which blood tests are needed, whether anaemia is present, and which treatment is appropriate. Clarify warning signs, follow-up timing, activity advice, and whether household or travel companions need assessment.