The mean ± SD of days between the onset of symptoms and the drawn sample was higher in cases of dengue confirmed by IgM antibody detection than in dengue cases confirmed by either RT-PCR or isolation virus, although these differences were not statistically significant (4.1 ± 1.9 days for IgM antibodies versus 3.8 ± 1.7 days for RT-PCR and virus isolation, P = 0.691). The gene discussed is CD40LG; the disease is dengue disease.