The most common cause of roseola is the human herpes virus type 6. It can also come from another member of the herpes group, type 7. Despite coming from the herpes group, roseola does NOT cause herpes to develop.
Since this is a contagious virus, roseola is able to spread from person to person quickly. Any type of contact with droplets from an infected person may result in contracting the virus. However, an infected person is only contagious during the fever portion of the sickness. Once rashes appear, they will no longer be contagious.
Infections and the spread of this virus occur at any time of the year. While contagious, it does not cause wide outbreaks like chickenpox.
Roseola infantum treatment: How roseola is diagnosed?
Since the initial signs and symptoms of roseola are quite similar to other illnesses, it can be a bit difficult to diagnose. Fever, coughing, or rashes can all be indicators of various childhood illnesses.
If a child is suspected of having roseola, the doctor will begin the diagnosis by reviewing the child’s medical history. Roseola will be confirmed once the fever dissipates and the telltale rashes appear. Occasionally, a blood test may be done by doctors to check antibodies to roseola.
Right after the rashes appear, doctors may conduct other tests to see if the fever was not caused by other infections or illnesses.