Outbreaks of human-herpes virus 6 (HHV-6) infection in day-care centers in Belém, Pará, Brazil
Rev. Inst. Med. Trop. Säo Paulo
;
42(6): 305-11, Nov.-Dec. 2000. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-274887
RESUMO
A total of 730 children aged less than 7 years, attending 8 day-care centers (DCCs) in Belém, Brazil were followed-up from January to December 1997 to investigate the occurrence of human-herpes virus 6 (HHV-6) infection in these institutional settings. Between October and December 1997 there have been outbreaks of a febrile- and -exanthematous disease, affecting at least 15-20 percent of children in each of the DCCs. Both serum- and- plasma samples were obtained from 401 (55 percent) of the 730 participating children for the detection of HHV-6 antibodies by enzyme-linked immunosorbent assay (ELISA), and viral DNA amplification through the nested-PCR. Recent HHV-6 infection was diagnosed in 63.8 percent (256/401) of them, as defined by the presence of both IgM and IgG-specific antibodies (IgM+/IgG+); of these, 114 (44.5 percent) were symptomatic and 142 (55.5 percent) had no symptoms (p = 0.03). A subgroup of 123 (30.7 percent) children were found to be IgM-/IgG+, whereas the remaining 22 (5.5 percent) children had neither IgM nor IgG HHV-6- antibodies (IgM-/IgG-). Of the 118 children reacting strongly IgM-positive ( > or = 30 PANBIO units), 26 (22.0 percent) were found to harbour the HHV-6 DNA, as demonstrated by nested-PCR. Taken the ELISA-IgM- and- nested PCR-positive results together, HHV-6 infection was shown to have occurred in 5 of the 8 DCCs under follow-up. Serological evidence of recent infections by Epstein-Barr virus (EBV) and parvovirus B19 were identified in 2.0 percent (8/401) and 1.5 percent (6/401) of the children, respectively. Our data provide strong evidence that HHV-6 is a common cause of outbreaks of febrile/exanthematous diseases among children attending DCCs in the Belém area
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Creches
/
Surtos de Doenças
/
Herpesvirus Humano 6
/
Exantema Súbito
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
/
Estudo prognóstico
/
Fatores de risco
Limite:
Criança
/
Criança, pré-escolar
/
Feminino
/
Humanos
/
Lactente
/
Masculino
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Rev. Inst. Med. Trop. Säo Paulo
Assunto da revista:
Medicina Tropical
Ano de publicação:
2000
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Ministério da Saúde/BR
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