Conversely, infection of BMMØ with IgG‐opsonized Chlamydia upregulated mRNA transcription of chemokines and cytokines Ccl11, Ccl2/MCP‐1 (highest, 5537‐fold), Ccl7/MCP‐3 and Ifnγ; antigen presentation and chemotaxis Cd8α, Cd28, Cd33, Cd40lg/Tnfsf5, Cd86 (highest, 4842‐fold), Cdc42, Clec4b2, Csf2/GM‐CSF, Cxcr4, H2‐DMa/MHC‐2, Icam1 and Rac1; and signal transduction Lyn (highest, 118‐fold), Nfkβ1 and Rela. This evidence concerns the gene CD33 and infection.