LYZ and infection: To explore this hypothesis, lysozyme expression was assessed during infections with an lpxO mutant (52145‐ΔlpxO), the 52145‐ΔmgrB‐ΔlpxO double mutant and 52145‐ΔmgrB‐ΔlpxO complemented with lpxO (52145‐ΔmgrB‐ΔlpxO‐lpxOCom).