Enhancing activity assay for patient sera using the new assay system. Samples #19-20, #37-20 and #37-30 were obtained from Chinese subjects positive to DENV, with a sample from healthy people #NS as a negative control. Sera in various dilutions were mixed with Luc-DENV and incubated for 72 h, and luciferase activities were measured in lysed K562 cells to assay enhancing activities. Error bars indicate the standard deviations from two independent experiments.
Song et al. BMC Microbiology 2014 14:44 doi:10.1186/1471-2180-14-44