Detection of EBV-infected B cells by in situ hybridization combined with immunohistochemistry.

<p>Granuloma serial sections were stained for CD1a (upper left) or for CD20 (middle left) by immunohistochemistry or for EBERs by in situ hybridisation (upper right, arrows indicate EBER positive cells). Combined detection of CD20 or CD79a with EBERs shows that EBV-infected cells are B cells (arrows).</p

Prevalence of HHV-6 infection in children before the age of 5 years

<p>Prevalence of HHV-6 infection in children before the age of 5 years</p

Detection of EBV, CMV, and HHV-6 DNA in biopsy samples from LCH granuloma.

<p>Positive results are expressed as the number of viral genome copies per million cells.</p

Prevalence of EBV, CMV, and HHV-6 infection as a function of age

<p>Prevalence of EBV, CMV, and HHV-6 infection as a function of age</p