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Concept
Mupirocin
Summary
Mupirocin, sold under the brand name Bactroban among others, is a topical antibiotic useful against superficial skin infections such as impetigo or folliculitis. It may also be used to get rid of methicillin-resistant S. aureus (MRSA) when present in the nose without symptoms. Due to concerns of developing resistance, use for greater than ten days is not recommended. It is used as a cream or ointment applied to the skin.
Common side effects include itchiness and rash at the site of application, headache, and nausea. Long term use may result in increased growth of fungi. Use during pregnancy and breastfeeding appears to be safe. Mupirocin is chemically a carboxylic acid. It works by blocking a bacteria's ability to make protein, which usually results in bacterial death.
Mupirocin was initially isolated in 1971 from Pseudomonas fluorescens. It is on the World Health Organization's List of Essential Medicines. In 2020, it was the 203rd most commonly prescribed medication in the United States, with more than 2 million prescriptions. It is available as a generic medication.
Mupirocin is used as a topical treatment for bacterial skin infections (for example, boils, impetigo, or open wounds), which are typically due to infection by Staphylococcus aureus or Streptococcus pyogenes. It is also useful in the treatment of superficial methicillin-resistant Staphylococcus aureus (MRSA) infections. Mupirocin is inactive for most anaerobic bacteria, mycobacteria, mycoplasma, chlamydia, yeast, and fungi.
Intranasal mupirocin before surgery is effective for prevention of post-operative wound infection with Staphylcoccus aureus and preventative intranasal or catheter-site treatment is effective for reducing the risk of catheter site infection in persons treated with chronic peritoneal dialysis.
Shortly after the clinical use of mupirocin began, strains of Staphylococcus aureus that were resistant to mupirocin emerged, with nares clearance rates of less than 30% success. Two distinct populations of mupirocin-resistant S. aureus were isolated.
Official source
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