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Efficacy of topical mupirocin against an experimental Staphylococcus aureus surgical wound infection
Abstract:
The efficacy of topically-applied mupirocin was evaluated against an experimental surgical staphylococcal wound infection in the guinea-pig. A suture impregnated with Staphylococcus aureus was inserted into a superficial wound, and topical therapy with mupirocin ointment was started 24 h after infection. In non-treated wounds, the bacterial counts increased to greater than 10(6) organisms/wound in the majority of animals at 24 h, remaining at this level for up to seven days. Therapy with placebo ointment (polyethylene glycol base) was ineffective, whereas twice daily application of mupirocin ointment resulted in elimination of the staphylococci. Mupirocin was as effective as topically-applied fusidic acid cream in reducing the bacterial counts of infected wounds.
Insights
Topical mupirocin effectively treats Staphylococcus aureus wound infections in guinea pigs. This antibiotic ointment eliminated bacteria, proving as effective as fusidic acid cream.
Area of Science:
- Microbiology
- Dermatology
- Pharmacology
Background:
- Staphylococcus aureus is a common cause of surgical wound infections.
- Topical antibiotics are crucial for managing localized bacterial infections.
- Mupirocin is a widely used topical antibiotic.
Purpose of the Study:
- To evaluate the efficacy of topical mupirocin against experimental Staphylococcus aureus wound infections in guinea pigs.
- To compare mupirocin's effectiveness with placebo and fusidic acid.
Main Methods:
- A guinea pig model of surgical staphylococcal wound infection was established.
- Topical mupirocin ointment was applied twice daily starting 24 hours post-infection.
- Bacterial counts in wounds were monitored over time.
- Comparison with placebo ointment and topical fusidic acid cream.
Main Results:
- Untreated wounds showed bacterial counts exceeding 10^6 organisms/wound for up to seven days.
- Placebo ointment was ineffective in controlling bacterial growth.
- Twice-daily mupirocin application led to the elimination of Staphylococcus aureus.
- Mupirocin demonstrated comparable efficacy to topical fusidic acid cream.
Conclusions:
- Topical mupirocin is highly effective in eradicating Staphylococcus aureus from experimental surgical wound infections.
- Mupirocin offers a viable treatment option comparable to fusidic acid for staphylococcal wound infections.