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Definition of Exanthema subitum
1. Noun. A viral disease of infants and young children; characterized by abrupt high fever and mild sore throat; a few days later there is a faint pinkish rash that lasts for a few hours to a few days.
Medical Definition of Exanthema subitum
1. An acute, short-lived, viral disease of infants and young children characterised by a high fever at onset that drops to normal after 3-4 days and the concomitant appearance of a macular or maculopapular rash that appears first on the trunk and then spreads to other areas. It is the sixth of the classical exanthematous diseases and is caused by hhv-6 (herpes virus 6, human). (12 Dec 1998)