IDO1 and infection: RT‐qPCR experiments showed that Kp52145 infection increased the levels of the M(Kp) markers arg1, il10, nos2, the ISG isg56 and ido in THP‐1 cells in a STAT6‐dependent manner because the STAT6 inhibitor AS1517499 abrogated Klebsiella‐mediated upregulation of these M(Kp) markers (Fig 8F–J).