Final answer:
The highly contagious bacterium that enters the skin through open wounds and can cause extremely serious staph infections is Methicillin-resistant Staphylococcus aureus (MRSA).
MRSA is a dangerous strain of Staphylococcus aureus that is resistant to many commonly used antibiotics. It can cause infections of the skin, as well as infecting the bloodstream, lungs, urinary tract, or sites of injury.
Step-by-step explanation:
The highly contagious bacterium that enters the skin through open wounds and can cause extremely serious staph infections is Methicillin-resistant Staphylococcus aureus (MRSA).
MRSA is a dangerous strain of Staphylococcus aureus that is resistant to many commonly used antibiotics, making it difficult to treat.
It can cause infections of the skin, as well as infecting the bloodstream, lungs, urinary tract, or sites of injury.