Kurkela S et al. - Tenderness on palpation or in movement of a joint was found in 14.3% of the patients in the rheumatological examination, and an additional 10.2% complained of persisting arthralgia at the interview. Thus, 24.5% of the patients had joint manifestations attributable to the infection 3 y earlier. A positive IgM antibody response persisted in 3/49 of the patients; both patients with arthritis were in this group. As one-quarter of the patients were symptomatic 3 y after infection, it seems that persistent symptoms of SINV infection have considerable public health implications in areas with high seroprevalence
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