I'm currently rotating through a facility that has guidelines to treat HCAP with concurrent Zosyn levaquin and vanc. As this is my first rotation, I'm not too sure how common/uncommon this abx course is. From what I can tell the vanc is there only for MRSA coverage? I'm doing my project on antibiotic resistances. We had a patient who received all 3 abx but wasn't tested for MRSA prior to initiating treatment. What am I missing here? Thanks for any insight!