Abstract
A previously well infant aged 9 months presented with an acute, self-limiting illness characterised by high fever and a papular eruption that started on the face. Although fever subsided within 3 days, the rash worsened and extended over the whole body, with some papules evolving into vesiculobullous lesions. The infant had been exposed to children with a similar illness 1 week before onset. PCR of vesicular swabs and stool samples taken on day 6 of illness showed Coxsackie virus A6. The illness resolved within 10 days of onset, although onychomadesis was seen on both big toes at follow-up 5 weeks later. Our case exemplifies the severe, atypical cases of hand, foot, and mouth disease that have been reported worldwide since 2008, and in the USA since the 2011. Atypical hand, foot, and mouth disease is caused by a new lineage of Coxsackie virus A6 and is characterised by high fever and vesiculobullous eruptions on the calves and backs of the hands. Infants with eczema might be predisposed to severe disease.
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