Of the 45 dengue-positive cases, 37 blood samples could be obtained within 5 days after the onset of the fever, where Dengue NS1 Ag was positive in 29 samples (78.38%), Dengue viral RNA positive in 25 samples (67.57%) and Dengue IgM antibodies in 17 samples (45.94%). This evidence concerns the gene CD40LG and dengue disease.