CD11b is the α‐subunit of 1 of the 3 β2‐integrin surface receptors—CD11b/CD18 (forming membrane‐associated component‐1, Mac‐1, MO‐1, complement receptor 3, CR3) which is expressed on bovine neutrophils and involved in cell migration into the site of inflammation or infection.20, 21, 22. This evidence concerns the gene ITGB2 and infection.