CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY
Illustration showing the Methicillin-resistant Staphylococcus aureus (MRSA) bacteria infecting lung tissue. MRSA is any strain of S. aureus that has developed resistance to antibiotics, making it especially troublesome in hospitals, prisons and nursing homes, where patients with open wounds, invasive devices, and weakened immune systems are at greater risk of infection than the general public.
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