
The bacterium Staphylococcus aureus can live on our skin and in our noses without causing disease. Such a condition is called bacterial colonization, to contrast it from infection in which the bacteria causes illness. When the skin is broken or when host immunity is weakened Staph. aureus can enter the blood stream or other body spaces and cause life-threatening infection. Because medical procedures frequently involve puncturing or cutting the skin, Staph. aureus a...
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