DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
MRSA: antibiotic resistant bacterium. Coloured transmission electron micrograph (TEM) of a section through a methicillin-resistant Staphylococcus aureus (MRSA) bacterium. This bacterium is resistant to most antibiotic drugs. Staphylococcus aureus is a Gram-positive spherical (coccus) bacterium. Here, its capsule (red), cell wall (green) and DNA (deoxyribonucleic acid) genetic material (yellow) are seen. S. aureus can cause boils, abscesses and wound infections. MRSA is of serious concern in hospitals and has caused dangerous outbreaks, particularly in geriatric wards. Its spread may be very hard to control. Magnification: x41,500 at 6x7cm size.
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