What is mupirocin ointment? And what does it treat?

Topical Antibiotic. Mupirocin (bactroban) is used to treat bacterial infections. It works by killing bacteria or preventing their growth. Mupirocin ointment is applied to the skin to treat impetigo. It may also be used for other bacterial skin infections.
Skin infections. Mupirocin ointment (marketed as bactroban) is an antibacterial ointment you put on your skin when you have a skin infection. It is generally effective against bacteria like s. Aureus and s. Pyogenes, which commonly live on everyone's skin. Sometimes, these bacteria can cause an infection. Make sure to go to you physician if you think you have a skin infection.