Ross River and Barmah Forest Infection

Mosquito-borne alpha virus infections with similar presentation

Occurs in all Australian states, mainly around inland rivers and in tropics

Major symptoms—fever, polyarthritis, maculopapular rash (in 75%), myalgia

Usually self-limiting, resolving in 2–4 wks

Occasional cases are severe

Diagnosis by specific serology

Symptomatic treatment—may need aspirin, paracetamol or steroids (avoid if possible)