FSME induces CD56 expression on human pDCs. Human pDCs were incubated with various stimuli as indicated and the expression of CD56 was studied by flow cytometry. (A) The gray filled histograms show the expression of CD56 on pDCs after overnight stimulation compared with isotype control (black lined histograms). Data shown are of 1 representative experiment of 3 performed. (B) The graphs show the percentage (left graph) and MFI (right graph) of CD56 expression on human pDCs after overnight stimulation. ; overnight FSME stimulation with 10% vol/vol, 5% vol/vol, and 2.5% vol/vol. Data shown are mean values ± SEM of at least 4 independent experiments performed with different donors.