To study the role of TLR9 in S. epidermidis– hMDM interactions, a specific inhibitor of TLR9 (ODN TTAGGG (A151), Invivogen) was employed to determine the role of TLR9-mediated DNA sensing for phagocytosis and activation of hMDM after infection with S. epidermidis. Here, TLR9 is linked to infection.