a viral disease resembling exanthema subitum, with the exanthema, if it develops, appearing after the fever has subsided; it is caused by strain 16 of ECHO virus.
[after the city in which an epidemic occurred]
Etymology: Boston; Gk, ex, out, anthema, blossoming
an epidemic disease characterized by scattered, pale red maculopapules on the face, chest, and back, occasionally accompanied by small ulcerations on the tonsils and soft palate. There is little or no adenopathy, and the rash disappears spontaneously in 2 or 3 weeks. It is caused by echovirus 16 and requires no treatment. Compare herpangina.