PMID- 15728809 OWN - NLM STAT- MEDLINE DCOM- 20050228 LR - 20220408 IS - 1533-4406 (Electronic) IS - 0028-4793 (Linking) VI - 352 IP - 8 DP - 2005 Feb 24 TI - A population-based study of primary human herpesvirus 6 infection. PG - 768-76 AB - BACKGROUND: Serologic studies indicate that human herpesvirus 6 (HHV-6) infects 90 percent of children by two years of age. Little is known about the acquisition, virologic course, and clinical manifestations of HHV-6 infection. METHODS: We prospectively studied a cohort of 277 children from birth through the first two years of life to define the pattern of acquisition of HHV-6. The children's saliva was tested weekly for HHV-6 DNA with the use of the polymerase chain reaction. Parents maintained a daily log of signs and symptoms of illness in their children. RESULTS: Primary HHV-6 infection occurred in 130 children, with cumulative percentages of 40 percent by the age of 12 months and 77 percent by the age of 24 months. The peak age of acquisition was between 9 and 21 months. The acquisition of HHV-6 was associated with female sex (adjusted hazard ratio, 1.7; 95 percent confidence interval, 1.2 to 2.4) and having older siblings (adjusted hazard ratio, 2.1; 95 percent confidence interval, 1.4 to 2.9). Among 81 children with a well-defined time of acquisition of HHV-6, 93 percent had symptoms, and 38 percent were seen by a physician. None had seizures. As compared with children who had other illnesses, those with primary HHV-6 infection were more likely to have fever (P=0.003), fussiness (P=0.02), diarrhea (P=0.03), rash (P=0.003), and roseola (P=0.002) and were more likely to visit a physician (P=0.003). CONCLUSIONS: The acquisition of HHV-6 in infancy is usually symptomatic and often results in medical evaluation. Roseola occurs in a minority of patients, and febrile seizures are infrequently associated with primary HHV-6 infection. Older siblings appear to serve as a source of HHV-6 transmission. CI - Copyright 2005 Massachusetts Medical Society. FAU - Zerr, Danielle M AU - Zerr DM AD - Department of Pediatrics, University of Washington, Seattle, USA. zerr@u.washington.edu FAU - Meier, Amalia S AU - Meier AS FAU - Selke, Stacy S AU - Selke SS FAU - Frenkel, Lisa M AU - Frenkel LM FAU - Huang, Meei-Li AU - Huang ML FAU - Wald, Anna AU - Wald A FAU - Rhoads, Margaret P AU - Rhoads MP FAU - Nguy, Long AU - Nguy L FAU - Bornemann, Rena AU - Bornemann R FAU - Morrow, Rhoda Ashley AU - Morrow RA FAU - Corey, Lawrence AU - Corey L LA - eng GR - AI-30731/AI/NIAID NIH HHS/United States GR - AI001679/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - N Engl J Med JT - The New England journal of medicine JID - 0255562 RN - 0 (Antibodies, Viral) RN - 0 (DNA, Viral) RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin M) SB - IM CIN - N Engl J Med. 2005 Feb 24;352(8):753-5. PMID: 15728806 MH - Antibodies, Viral/blood MH - Child, Preschool MH - DNA, Viral/analysis MH - Exanthema Subitum/diagnosis/epidemiology MH - Female MH - Fever/etiology MH - *Herpesvirus 6, Human/genetics/immunology/isolation & purification MH - Humans MH - Immunoglobulin G/blood MH - Immunoglobulin M/blood MH - Incidence MH - Infant MH - Infant, Newborn MH - Male MH - Polymerase Chain Reaction MH - Proportional Hazards Models MH - Prospective Studies MH - Risk Factors MH - Roseolovirus Infections/complications/diagnosis/*epidemiology MH - Saliva/virology MH - Sex Factors MH - Survival Analysis EDAT- 2005/02/25 09:00 MHDA- 2005/03/01 09:00 CRDT- 2005/02/25 09:00 PHST- 2005/02/25 09:00 [pubmed] PHST- 2005/03/01 09:00 [medline] PHST- 2005/02/25 09:00 [entrez] AID - 352/8/768 [pii] AID - 10.1056/NEJMoa042207 [doi] PST - ppublish SO - N Engl J Med. 2005 Feb 24;352(8):768-76. doi: 10.1056/NEJMoa042207.