- In the following weeks, a number of clinically suspect cases were reported, and serum samples were sent to the CNIPH, but tested negative for dengue virus.- 22 October 2010, a possible case of dengue fever was reported in a resident of the same village where the German patient had stayed, then confirmed by paired sera with increase in IgM and IgG.- From the 14 samples, nine were positive for IgG and 7 had positive or borderline results for IgM- From the 112 samples, 6 had positive IgG (5.4%) and five positive or borderline IgM. Here, CD40LG is linked to dengue disease.