Barbara's infection did not respond to oxacillin therapy due to MRSA, requiring vancomycin treatment. The port and catheter were removed to prevent further infection.
Barbara's condition likely worsened despite oxacillin therapy due to the presence of methicillin-resistant Staphylococcus aureus (MRSA), which is not susceptible to oxacillin. Vancomycin was chosen as an alternative as it is effective against MRSA. The physician removed the port and catheter to eliminate potential sources of infection and prevent further spread.
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