A 34-year-old female has an open sore on her leg that worsens despite antibiotics. Which infection is most likely?

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Multiple Choice

A 34-year-old female has an open sore on her leg that worsens despite antibiotics. Which infection is most likely?

When a skin lesion, like an open sore on the leg, gets worse despite antibiotics, think of an antibiotic-resistant infection. Methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of persistent skin and soft tissue infections because it isn’t killed by many standard antibiotics. These MRSA infections often present as enlarging, painful, draining wounds that don’t improve with ordinary beta-lactam antibiotics, making MRSA the most likely cause in this scenario. Ring worm is a fungal infection, so it wouldn’t be correctly treated by antibiotics and would have a different presentation and treatment. Folliculitis and boils are typically bacterial infections caused by Staph and can improve with appropriate therapy, but when a lesion fails to respond to standard antibiotics, MRSA becomes the leading consideration.

When a skin lesion, like an open sore on the leg, gets worse despite antibiotics, think of an antibiotic-resistant infection. Methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of persistent skin and soft tissue infections because it isn’t killed by many standard antibiotics. These MRSA infections often present as enlarging, painful, draining wounds that don’t improve with ordinary beta-lactam antibiotics, making MRSA the most likely cause in this scenario.

Ring worm is a fungal infection, so it wouldn’t be correctly treated by antibiotics and would have a different presentation and treatment. Folliculitis and boils are typically bacterial infections caused by Staph and can improve with appropriate therapy, but when a lesion fails to respond to standard antibiotics, MRSA becomes the leading consideration.

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