CD11b⁺, CD27⁺ NK cell frequency increases in the mLN during infection with <i>Y</i>. <i>pseudotuberculosis</i> YPIII.

<p>(A) Mice were infected with 2 x 10⁷ CFU of <i>Y</i>. <i>pseudotuberculosis</i> strain YPIII. Three days post infection mLN were excised and NK cell population distribution was analyzed by flow cytometry. To do so, cells were stained with Live/Dead, CD3, NK1.1, CD11b, CD27, CD69 and CD107a. Grey filled squares represent uninfected mice, black filled circles illustrate <i>Y</i>. <i>pseudotuberculosis</i> infected mice. CD11b⁺, CD27⁺ NK cells from the mLN were further analyzed for their expression profiles of the surface markers CD107a (B) and CD69 (C). Grey filled squares represent uninfected mice, while black filled circles represent YPIII infected mice. Data from three independent experiments were pooled and analyzed with a Student’s t-test (*, p < 0.05; ***, p<0.001).