• Roseola infantum is a rash disease caused by Human Herpesvirus type 6 (HHV6) in the majority of cases and Human Herpesvirus type 7 (HHV7) in a small number of cases.
• The importance of roseola infantum is that it mimics other serious diseases characterized by high fever and can cause febrile convulsions.
Clinic
• Roseola infantum is usually seen in children aged 6 months to 4 years and 90% before 2 years of age.
• The most important clinical finding of the disease is sudden onset fever, which can reach 40.6°C and lasts in 2-8 days (average 4 days). The patient is generally well except for high fever.
• The fever subsides rapidly and a characteristic rash appears after the fever subsides.
• The rash typically starts on the trunk and spreads to the face, neck and extremities. "Rose-pink" macules or maculopapules 2-3 mm in diameter usually coalesce and heal within 1-2 days without leaving any pigmentation or desquamation.
Complications
• Febrile convulsion (most common)
• Meningoencephalitis or aseptic meningitis (in some cases HH6 directly infects the CNS).
• Multiorgan disease (pneumonia, hepatitis) may develop in immunocompromised patients.
• Encephalitis and pseudotumor cerebri may develop.
• PALE (posttransplant acute limbic encephalopathy): Memory problems, insomnia, confusion and convulsions are seen after bone marrow transplantations.
The most common papullovesicular disease ..... Chickenpox
Diseases in which itching is most prominent .....Red scarlet, 5th disease, chickenpox
The spots seen in the prodrome period of measles are … Koplik spots
Typical spread of measles rash ..... Starts behind the ears and neck and spreads to the trunk
The most common complication of measles ...... Otitis
Most common cause of death in measles....... Pneumonia
Illness with rash that can lead to tuberculosis reactivation (lymphopenia) ..... Measles
The latest improvement in measles .... Cough
The latest complication of measles ..... SSPE
Infection causing acute abdomen by causing mesenteric lymphadenitis ..... Measles
Which vitamin supplement in measles alleviates the clinical course .... Vitamin A
Among the rash diseases, the most neurological complication is .... Measles
Difference between chickenpox and smallpox rash:Simultaneous rash in all stages of chickenpox
The most common complication of chickenpox is secondary skin infection, the second most common ataxia
The most common CNS complication of chickenpox ... Cerebellitis
Leukocytosis in a patient with chickenpox is suggestive of secondary bacterial infection.
What infection does the Tzank test suggest? Chickenpox , HSV
Rash disease of the fetus with severe teratogenic effect in the 1st trimester ... Rubella and chicken pox
Disease in which Theodor phenomenon is seen . Rubella
The first finding after the prodromal period in rubella . lymphadenopathies
First choice in the treatment of scarlet fever ... Penicillins
Antibiotic not used in the treatment of scarlet fever. Sulfonamides
The rash disease in which the rash lasts the longest.. Erythema infectiosum
Peroral pallor disease. Scarlet fever and the 5th disease
Petechiae seen in the folds of the skin in scarlet .... Pastia lines
What is the Shultz - Karlton extinction phenomenon: Fading when anti-erythrogenic toxin is applied to the skin lesion in scarlet fever
Illness that is not contagious when the rash appears ... Erythema infectiosum
