PEDIATRICS Vol. 105 No. 2 February 2000, pp. 431-433
EXPERIENCE AND REASON:
In Situ Hybridization Detection of Human Herpesvirus 6 in Brain Tissue From Fatal Encephalitis
Received Apr 27, 1999; accepted Jul 23, 1999.
,
Departments of * Virology and
Pathology
Haartman Institute
FIN-00014 University of Helsinki
Helsinki, Finland
Hospital for Children and Adolescents University of Helsinki Helsinki, 00290 Finland
Jorvi Hospital Espoo, 02740 Finland
A 23-month-old girl died after 2 days' illness with rash, fever, and convulsions. Neuropathologic findings were consistent with viral hemorrhagic encephalitis in pontine tegmentum and medial thalamic areas. Human herpesvirus 6 (HHV-6) DNA was detected in pontine nuclei by in situ hybridization. In addition, polymerase chain reaction for HHV-6 of serum and paraffin-embedded pontine tissue was positive, and serology indicated an acute primary infection. This is the first case showing HHV-6 DNA in the brain cells of an immunocompetent patient with acute encephalitis.
Key words: human herpesvirus 6, in situ hybridization, encephalitis, roseola infantum.
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