roseola infantum

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 [ro-ze´o-lah, ro″ze-o´lah] (L.)
1. any rose-colored rash.
roseola infan´tum a common acute disease caused by infection with the herpesvirusRoseolovirus. It usually occurs in children under two years old, coming on suddenly and disappearing in 3 to 5 days, leaving no permanent marks. Diagnosis is difficult because the sole early symptom, beyond irritability and drowsiness, is fever. There may be convulsions, and generally the fever is very high; 40°C (104°F) is not unusual. Despite the high fever, the disease is mild. Called also exanthem subitum.

As the fever subsides and the disease is apparently at an end, a rash breaks out, usually on the body. This is unlike the course of other childhood diseases such as measles, scarlet fever, and chickenpox, in which the rash is present during the most intense phase; the rash of roseola infantum lasts only a few days and may disappear within hours (often it is so transitory that it is missed). Treatment consists only of such standard measures as antipyretics and tepid sponge baths to allay the fever. Rest and fluids are also recommended.

Once it is over, the child is believed to be permanently immune from further attacks. Roseola is sometimes confused with rubella, but is distinguished by having no lymph node involvement. Blood antibody titers are sometimes used when symptoms appear, to determine which disease it is.
syphilitic roseola an eruption of rose-colored spots in early secondary syphilis.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ex·an·the·ma su·bi·tum

a disease of infants and young children caused by human herpesvirus-6, marked by sudden onset with fever lasting several days (sometimes with convulsions) and followed by a fine macular (sometimes maculopapular) rash that appears within a few hours to a day after the fever has subsided.
Farlex Partner Medical Dictionary © Farlex 2012

roseola infantum

Exanthem subitum, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

roseola infantum

A common disorder of small children of unknown cause. Roseola has been transmitted by filtered blood but no virus has, so far, been demonstrated. There is high fever for three days, enlarged lymph nodes, and, as the fever settles, a very transient pink rash similar to that of RUBELLA. The rash may last for less than a day and is easily missed. Complete recovery without treatment is the rule. Also known as ‘sixth disease’ or exanthem subitum.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Patient discussion about roseola infantum

Q. roseola high fever

A. roseola; any rose colored eruption of the skin--roseola is a viral infection of young children producing a fever which last three or four days after which temperatures drops to normal,a skin rash appears and the child becomes better---treated with meds that lower fever and stops the rash.

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