PMID- 8703244 OWN - NLM STAT- MEDLINE DCOM- 19960912 LR - 20161021 IS - 0125-877X (Print) IS - 0125-877X (Linking) VI - 13 IP - 2 DP - 1995 Dec TI - Seroprevalence of human herpesvirus 6 and 7 infections in the Thai population. PG - 151-7 AB - Seroprevalence of human herpesvirus 6 (HHV-6) and 7 (HHV-7) was estimated in the Thai population using indirect immunofluorescence assay to determine serum antibodies to HHV-6 and HHV-7. A total of 333 serum samples obtained from umbilical cord blood and venous blood of healthy persons at Siriraj Hospital and Krabi Hospital during 1990-1993 were investigated. Of 73 infants aged 0-1 month, 73% and 78% were found tob e positive for HHV-6 and HHV-7 antibodies, respectively. Antibody to HHV-6 was detected in age groups 2-3 months (38%), 4-5 months (14%), 6 months (44%), 7-11 months (66%), 1-2 year (84%), 3-4 years (82%), 5-9 years (83%), 10-19 years (83%), 20-29 years (80%), 30-39 years (67%), and over 40 years (58%), respectively. This positive rates of HHV-7 antibody in age groups 2-3 months, 4-5 months, 6 months, 7-11 months, 1-2 years, 3-4 years, 5-9 years, 10-19 years, 21-29 years, 30-39 years, and over 40 years were 50%, 21%, 10%, 37%, 47%, 82%, 75%, 72%, 72%, 67%, and 67%, respectively. At 6 months of age as the starting time of infections, 34% (14/41) and 9% (3/41) of infants had presumed primary infections of HHV-6 and HHV-7, respectively. In the follow-up study, 53% (20/38) of children were infected with HHV-6 prior to HHV-7 and only 5% vice versa. Eighty-four percent of children had acquired antibody to HHV-6 by 1-2 years old while 82% of children had acquired antibody to HHV-7 by 3-4 years old. These results suggest that HHV-6 and HHV-7 are prevalent viruses in the Thai population. The infections of both viruses begin at 6 months of age. However, infection of HHV-7 in most children begins later. The data also provided evidence that antigenic distinction between HHV-6 and HHV-7 existed with a limited cross-reactivity in an antibody test. The antibody responses to HHV-6 and HHV-7 occurred independently. FAU - Kositanont, U AU - Kositanont U AD - Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. FAU - Wasi, C AU - Wasi C FAU - Ekpatcha, N AU - Ekpatcha N FAU - Poomchart, A AU - Poomchart A FAU - Likanonsakul, S AU - Likanonsakul S FAU - Suphanip, I AU - Suphanip I FAU - Balachandra, K AU - Balachandra K FAU - Yamanishi, K AU - Yamanishi K LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Thailand TA - Asian Pac J Allergy Immunol JT - Asian Pacific journal of allergy and immunology JID - 8402034 RN - 0 (Antibodies, Viral) SB - IM MH - Adolescent MH - Adult MH - Age Factors MH - Antibodies, Viral/*analysis MH - Child MH - Child, Preschool MH - Herpesvirus 6, Human/*immunology MH - Herpesvirus 7, Human/*immunology MH - Humans MH - Infant MH - Infant, Newborn MH - Seroepidemiologic Studies MH - Thailand/epidemiology EDAT- 1995/12/01 00:00 MHDA- 1995/12/01 00:01 CRDT- 1995/12/01 00:00 PHST- 1995/12/01 00:00 [pubmed] PHST- 1995/12/01 00:01 [medline] PHST- 1995/12/01 00:00 [entrez] PST - ppublish SO - Asian Pac J Allergy Immunol. 1995 Dec;13(2):151-7.