Sequence analysis for HHV-6 identified HHV-6 species A in
4 EMB tissues (5.4%) while HHV-6 species B was present in the
remaining 69 EMB specimens (94.5%). Systemic HHV-6 genomes
were found in 2 patients with proof of HHV-6 A in EMB. Baseline
characteristics did not differ between patients with HHV-6 A
and B.