Definition

Noun: * A common, typically mild viral illness affecting infants and young children. It is characterized by a high fever that appears suddenly and lasts for several days, followed by the appearance of a distinctive rash as the fever subsides.

Usage

• The term is used in medical contexts to diagnose and describe this specific childhood illness.
• It is often discussed by pediatricians with parents.
• Example: "The pediatrician diagnosed the baby's high fever and subsequent rash as roseola infantum."

Advanced Usage

• The disease is also commonly known by the shorter names roseola or exanthem subitum.
• It is primarily caused by human herpesvirus 6 (HHV-6) and sometimes human herpesvirus 7 (HHV-7).

Variants and Related Words

• Roseola: The more common, shortened name for the illness.
• Exanthem subitum: The medical Latin name, meaning "sudden rash."
• Sixth disease: A historical name, as it was once classified as the sixth common childhood rash illness.

Synonyms

• Baby measles (an informal, non-medical term)
• Three-day fever

Key Characteristics (Not a separate section, but integrated for clarity)

• High Fever: The initial symptom is a sudden, high fever (often over 103°F or 39.4°C) that lasts 3-5 days.
• Rash: Once the fever breaks, a pinkish-red rash appears on the torso and sometimes spreads to the neck, face, and limbs. The rash is not itchy and typically fades within hours to a couple of days.
• Other Symptoms: May include mild irritability, runny nose, cough, or swollen glands. Febrile seizures can occur due to the rapid rise in fever.

Noun

1. 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