The nurse would expect the parent to report that 'the infant's temperature fell when the rash appeared' when a 6-month-old infant develops roseola.
A virus, mostly human herpes virus 6 or occasionally human herpes virus 7, is the cause of roseola. It is transmitted through the air when a person with roseola coughs or sneezes, or by coming into touch with saliva from an infected person, such as while sharing a cup.
After contact with an infected person, symptoms may not appear for 9 to 10 days.
Following a 24-hour period without a fever, roseola is no longer communicable.
In contrast to paediatric viral infections like chickenpox that spread quickly, roseola rarely causes a widespread outbreak. Infections typically happen in the spring and fall.
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