PMID- 11710680 OWN - NLM STAT- MEDLINE DCOM- 20011205 LR - 20081121 IS - 0002-9173 (Print) IS - 0002-9173 (Linking) VI - 116 IP - 5 DP - 2001 Nov TI - Prevalence and cellular reservoir of latent human herpesvirus 6 in tonsillar lymphoid tissue. PG - 648-54 AB - There are few studies that examine prevalence, quantity, and cellular proclivity of latent human herpesvirus 6 (HHV-6) in healthy populations. We examined 69 tonsils with paired blood specimens from children without evidence of acute infection. By polymerase chain reaction (PCR), HHV-6 was detected at low levels in 100% of tonsils and 39% of blood samples (n = 27), suggesting that prevalence of latent HHV-6 infection is high in children and may be underestimated by PCR analysis of blood. Although HHV-6A and HHV-6B were detected, HHV-6B predominated, being found in 97% of samples (n = 67). Tonsil sections from 7 cases were examined by in situ hybridization using 2 HHV-6 probes and immunohistochemical analysis. Using both in situ hybridization and immunohistochemical analysis, all tissues revealed marked HHV-6-specific staining in the squamous epithelium of the tonsillar crypts and rare positive lymphocytes. We conclude that HHV-6 is present universally in tonsils of children, and tonsillar epithelium may be an important viral reservoir in latent infection. FAU - Roush, K S AU - Roush KS AD - Department of Pathology, University of Texas Southwestern Medical Center at Dallas, USA. FAU - Domiati-Saad, R K AU - Domiati-Saad RK FAU - Margraf, L R AU - Margraf LR FAU - Krisher, K AU - Krisher K FAU - Scheuermann, R H AU - Scheuermann RH FAU - Rogers, B B AU - Rogers BB FAU - Dawson, D B AU - Dawson DB LA - eng PT - Journal Article PL - England TA - Am J Clin Pathol JT - American journal of clinical pathology JID - 0370470 RN - 0 (DNA Primers) RN - 0 (DNA, Viral) SB - IM MH - Adolescent MH - Child MH - Child, Preschool MH - DNA Primers/chemistry MH - DNA, Viral/analysis MH - Enzyme-Linked Immunosorbent Assay MH - Exanthema Subitum/pathology/*virology MH - Female MH - Herpesvirus 6, Human/classification/genetics/*isolation & purification MH - Humans MH - In Situ Hybridization MH - Infant MH - Lymphocytes/pathology/virology MH - Male MH - Palatine Tonsil/pathology/*virology MH - Polymerase Chain Reaction EDAT- 2001/11/17 10:00 MHDA- 2002/01/05 10:01 CRDT- 2001/11/17 10:00 PHST- 2001/11/17 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/11/17 10:00 [entrez] AID - 10.1309/Y2HH-B1CK-0F5L-U7B8 [doi] PST - ppublish SO - Am J Clin Pathol. 2001 Nov;116(5):648-54. doi: 10.1309/Y2HH-B1CK-0F5L-U7B8.