Previously a study reported that in the existence of a virus-specific antibody, virus of dengue-2 sticks to the platelets [17,24]. By Satio et al. in a study among 21 patients with secondary dengue infection, observed a high positive rate of 42.85 with dengue-virus RNA in purified platelets samples through RT-PCR [17].
This data indicates that dengue-virus is present on the circulating platelets in subjects having secondary dengue infection, this supports our assumption of a procedure of inducing thrombocytopenia by involving the development of PAIgG/PAIgM. The increase in the PAIgG/PAIgM levels was significant, and we also observed that there was a significant correlation between PAIgG/PAIgM levels and platelets count in patients having acute secondary phase infection, the PAIgG in 8 patients (29.6%) and PAIgM in 17 patients (68%) levels persisted within normal range (0–14.9 ng/107 platelets in case of PAIgG, while 0–12 ng/107 platelets in case of PAIgM). So our data indicates that in these patients other methods may also be operative that are involve in the development of thrombocytopenia. The contribution of PAIgG appears to be much greater than that of PAIgM for induction of thrombocytopenia.