DAVID NICHOLLS / SCIENCE PHOTO LIBRARY DAVID NICHOLLS / SCIENCE PHOTO LIBRARY
MRSA. Graphic displaying MRSA surrounded by shapes representing bacteria. MRSA stands for methicillin-resistant Staphylococcus aureus. MRSA is a gram-positive, round (coccus) bacterium. It is resistant to many commonly presrcribed antibiotics. S. aureus is carried by around 30% of the population without cuasing any symptoms. However, in vulnerable people, such as those that have recently had surgery or those with poor immune systems, it can cause wound infections, pneumonia and blood poisoning. The spread of MRSA can be prevented by health workers washing their hands between patients and before procedures.
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