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The choice of antibiotic in open fractures in a teaching hospital in a developing country
T O Alonge1, S A Salawu, A T Adebisi
1Department of Surgery, University College Hospital, Ibadan, Nigeria.
Abstract:
Open fracture wounds may be contaminated, and the use of an appropriate antibiotic in the early stages of management reduces the risk of osteomyelitis developing. Environmental factors influence both the type of micro-organisms that are isolated from these wounds and the antibiotics that are chosen to manage the wounds. Before this study, the choice of antibiotic in the management of open fractures in our hospital was based on tradition and 'best guess' antibiotics. In a prospective study of 52 open fractures seen in the accident and emergency unit of University College Hospital, Ibadan, between January and June 2000, the positive bacterial culture yield was more than 70%. Staphylococcus aureus was the commonest microbial isolate, accounting for 37.5% of total isolates. The antibiotic sensitivity pattern revealed high efficacies for pefloxacin, ciprofloxacin and ceftriaxone against the isolated micro-organisms. In comparative costs, these antibiotics are cheaper than the combination of the 'best guess' antibiotics that were used previously. On the strength of this finding, we have suggested a change in the antibiotic policy of the hospital with regard to the antibiotic regimen to be used to complement the surgical management of open fractures.
Insights
Early antibiotic use in open fractures prevents osteomyelitis. This study identified effective, cost-efficient antibiotics like pefloxacin and ciprofloxacin for managing contaminated wounds, improving patient outcomes.
Area of Science:
- Orthopedic Surgery
- Infectious Diseases
- Clinical Microbiology
Background:
- Open fractures present a high risk of contamination and subsequent osteomyelitis.
- Current antibiotic selection for open fractures relied on empirical 'best guess' methods.
- Environmental factors significantly impact microbial flora and antibiotic susceptibility in wound infections.
Purpose of the Study:
- To determine the common microbial isolates in open fracture wounds.
- To evaluate the in vitro efficacy of specific antibiotics against these isolates.
- To inform an evidence-based antibiotic policy for open fracture management.
Main Methods:
- Prospective study of 52 open fracture cases over six months.
- Bacterial culture and sensitivity testing performed on wound samples.
- Analysis of antibiotic efficacy and comparative cost-effectiveness.
Main Results:
- Over 70% of open fracture wounds yielded positive bacterial cultures.
- Staphylococcus aureus was the most frequent isolate (37.5%).
- Pefloxacin, ciprofloxacin, and ceftriaxone demonstrated high efficacy against common isolates and were cost-effective.
Conclusions:
- Established an evidence-based antibiotic regimen for open fracture management.
- Recommended updating the hospital's antibiotic policy to include pefloxacin, ciprofloxacin, and ceftriaxone.
- Improved treatment protocols for open fractures, reducing osteomyelitis risk and healthcare costs.
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