Dengue Virus Infections and Maternal Antibody Decay in a Prospective Birth Cohort Study of Vietnamese Infants

作者：Tran Nguyen Bich Chau; Nguyen Trong Hieu; Anders Katherine L; Wolbers Marcel; Le Bich Lien; Lu Thi Minh Hieu; Tran Tinh Hien; Nguyen Thanh Hung; Farrar Jeremy; Whitehead Stephen; Simmons Cameron P^*

来源：Journal of Infectious Diseases, 2009, 200(12): 1893-1900.

DOI：10.1086/648407

Dengue hemorrhagic fever can occur in primary dengue virus (DENV) infection of infants. The decay of maternally derived DENV immunoglobulin (Ig) G and the incidence of DENV infection were determined in a prospectively studied cohort of 1244 Vietnamese infants. Higher concentrations of total IgG and DENV-reactive IgG were found in cord plasma relative to maternal plasma. Maternally derived DENV-neutralizing and E protein-reactive IgG titers declined to below measurable levels in 190% of infants by 6 months of age. In contrast, IgG reactive with whole DENV virions persisted until 12 months of age in 20% of infants. Serological surveillance identified 10 infants with asymptomatic DENV infection for an incidence of 1.7 cases per 100 person-years. DENV-neutralizing antibodies remained measurable for >= 1 year after infection. These results suggest that whereas DENV infection in infants is frequently subclinical, there is a window between 4 and 12 months of age where virion-binding but nonneutralizing IgG could facilitate antibody-dependent enhancement.

• 出版日期2009-12-15