Big Bugs: Pseudomonus and MRSA

MRSA (methcillin resistant staph aureus) is a gram (+), catalase (+) cocci in clusters. MRSA is often sensitive to the following drugs:

• Vancomycin 500mg IV qid
• Bactrim 80/400 or 160/800 PO BID
• Linezolid 400-600mg BID

Pseudomonas is a gram (-) rod w/pili and flagella and is often sensitive to:

• Ciprofloxacin 500mg PO BID
• 3rd Gen cephalosporins 
• Aztreonam 0.5-2mg IM/IV q6-12h
• Zosyn(piperacillin/tazobactam) 3.375g IV q4-6h
• Timentin(ticarcillin/clavulanate) 3.1g IV q4-6h