Gram-positive bacterial Infections are caused by gram-positive bacteria such as methicillin-resistant Staphylococcus aureus MRSA, vancomycin-resistant enterococci VRE, and Clostridium difficile. Examples of gram-positive bacterial infections include:  AnthraxDiphtheriaEnterococcalListeriosisNocardiaStaphylococcalStreptococcal