Key result
Epidemic polyarthritis presents with sudden muscle aching, extensive polyarthritis, and a maculopapular rash in ~78%.
Cross-Sectional (n=528)
Epidemic polyarthritis presents with sudden muscle/joint aching, maculopapular rash, and extensive polyarthritis, with a mean incubation time of 9 days and higher prevalence in women.
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May aid diagnosis of epidemic polyarthritis; leaves open need for prospective validation in modern cohorts.
Information concerning their clinical illness was obtained by self-administered questionnaire from 528 patients who suffered from epidemic polyarthritis in Australia during 1980 and 1981. The clear and uniform clinical picture which has emerged from this study should facilitate the diagnosis of this disease. The illness begins suddenly with the onset of acute aching in the muscles and joints, followed by a maculopapular rash in between 40% and 78% of patients, and extensive polyarthritis. This affects chiefly the ankles, fingers, knees and wrists, usually serially, but no joint is spared. Estimates of incubation time suggest that it ranges from three to 21 days (mean, nine days). Women, especially housewives, are the group most frequently affected. Exposure to mosquitoes is an important predisposing factor; the implications of this for prevention and future research are considered. The mechanism of the survival of the virus in nature remains poorly understood.
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Mudge et al. (1983) conducted a cross-sectional in Epidemic polyarthritis (n=528). Mosquito exposure was evaluated on Clinical presentation and incubation time. Epidemic polyarthritis presents with sudden acute muscle and joint aching, followed by a maculopapular rash in 40% to 78% of patients, and extensive polyarthritis.
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