Human herpesvirus 7 (HHV-7) was isolated frequently from saliva specim
ens. The isolation rates were 81% (13/16) in adults, 70% (7/10) in chi
ldren over 1 year old, and none (0/7) in children less than 1 year old
, respectively, indicating that infection of HHV-7 occurs during early
infancy and the virus shedding rate after infection is very high. Hum
an herpesvirus 6 (HHV-6) was not isolated from saliva specimens althou
gh some studies on isolation of HHV-6 from saliva was reported previou
sly. (C) 1993 Wiley-Liss, Inc.