Dissection of respiratory DC subsets into plasmacytoid DC, CD103+ DC and CD11b+ DC revealed a significant suppression of plasmacytoid DC infiltration early after infection (p < 0.001, 48 h p.i) and of plasmacytoid DC, CD103+ DC and CD11b+ DC late after infection (p < 0.01, d5 p.i). This evidence concerns the gene ITGAM and infection.