LYZ and infection: Infection with the 52145‐ΔpmrC‐ΔlpxO‐ΔmgrB, 52145‐ΔmgrB‐ΔlpxO‐ΔpmrF and 52145‐ΔpmrC‐ΔlpxO‐ΔmgrB‐ΔpmrF triple and quadruple mutants restored lysozyme expression to wild‐type levels (Fig 3D).