Neutralizing antibodies after infection with dengue 1 virus.
Emerg Infect Dis
; 13(2): 282-6, 2007 Feb.
Article
em En
| MEDLINE
| ID: mdl-17479892
Severity of disease is markedly increased when infection with dengue virus type 2 (DENV-2) follows infection with DENV-1 at an interval of 20 years. Studies have shown that heterologous neutralizing antibody titers are inversely correlated with severity of a second infection. If this mechanism controlled disease severity in Cuba, heterotypic antibody titers should have declined over time. To determine whether phenotypic changes in dengue antibodies occur over time, we analyzed serum samples collected 4-8 and 20-22 years after DENV-1 infection. We found a significant increase in mean titer of homologous DENV-1 neutralizing antibodies and a significant decrease in heterologous antibodies to 1 of 2 genotypes of DENV-2 virus (the American genotype). Asian DENV-2 viruses were not neutralized during either interval; however, the American genotype underwent phenotypic changes in heterotypic viral neutralizing antibodies in the predicted direction. This finding may be related to the time-dependent changes in severity of disease found with secondary dengue infection.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dengue
/
Vírus da Dengue
/
Anticorpos Antivirais
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Emerg Infect Dis
Assunto da revista:
DOENCAS TRANSMISSIVEIS
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Cuba
País de publicação:
Estados Unidos