Dr. Mersch received his Bachelor of Arts degree from the University of California, San Diego, and prior to entering the University Of Southern California School Of Medicine, was a graduate student (attaining PhD candidate status) in Experimental Pathology at USC. He attended internship and residency at Children's Hospital Los Angeles.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
Roseola is a mild illness caused by a virus infection. Roseola has a sudden onset and short duration, and it most commonly affects young
children. Roseola is most common in children 6 to 24 months of age. The average age at onset is around 9 months. Less frequently, older children, teens, and (rarely) adults may be infected.
Roseola is spread from person to person, most likely by transfer of oral secretions. Roseola is not very contagious. The incubation period between exposure to the virus and onset of symptoms is
nine to 10 days. Humans are the only natural hosts for HHV-6 and HHV-7. Unlike other viral infections, roseola occurs throughout the year without seasonal variation.
The signs and symptoms of HHV-6 (or HHV-7) infection vary depending upon the age of the patient.
toddlers routinely will develop sudden symptoms with a sudden
onset of a high fever that lasts for
three to five days, irritability, bulging "soft spot" on the head (fontanel),
swollen glands in the front or back of the neck, runny nose, puffy eyelids (due to swelling with fluid), and mild diarrhea. Within 12-24 hours of the fever breaking, a rash rapidly appears. Older children who develop HHV-6 (or HHV-7) infection are more likely to have an illness characterized by several days of high fever and possibly a runny nose and/or diarrhea. Older children less commonly develop a rash as the fever abates.
Yes, but not in the beginning. When the fever disappears, a rash appears. The rash is mainly located on the neck and torso (the abdomen, trunk, and back), but it can also be on the arms and legs (extremities).
The rash appears as separate little raised dots (papules) or as a
flat (macular) rash. The skin is mildly red in color and temporarily blanches with pressure. The rash is not itchy or painful. It is not contagious. The rash lasts
two to four days and does not return.