Volume 16, Number 11—November 2010
Isolation of Ancestral Sylvatic Dengue Virus Type 1, Malaysia
|Serum group*||Neutralizing antibody titer†|
*Mock, controls treated with serum from healthy (no dengue infection) donors; virus, virus plus diluent; medium, serum and diluent without virus; SI, subgenotype I; SII, subgenotype II.
†Reciprocal of the highest serum dilution that reduced viral foci by 50% (50% focus-reduction neutralization test). Serum from patients infected with sylvatic virus was not available. Virus was treated with serum from patients infected with primary dengue virus type 1 SI or SII.