Methicillin-Resistant-Staphylococcus-aureus-(MRSA)-Bacteria March 19, 2016 1050 × 640 Methicillin-Resistant-Staphylococcus-aureus-(MRSA)-Bacteria Scanning electron micrograph of methicillin-resistant Staphylococcus aureus (MRSA, brown) surrounded by cellular debris. MRSA resists treatment with many antibiotics. Credit: NIAID