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Updated: Jul 15, 2026
Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
Published on: June 4, 2012
Vascular graft infection by Staphylococcus aureus: efficacy of cefazolin, teicoplanin and vancomycin prophylaxis
1Department of Cardiovascular Surgery, School of Medicine, Kahramanmaras Sutcu Imam University, 46100, Turkey. atahanerhan@hotmail.com
Objectives:
Prophylactic efficiencies of cefazolin, teicoplanin and vancomycin in a dacron graft infection model caused by methicillin-susceptible (MSSA) or -resistant Staphylococcus aureus (MRSA) were investigated.
Design:
Prospective, randomized, controlled animal study.
Materials And Methods:
Infections were established subcutaneously in the back of rats by implantation of Dacron prostheses followed by topical inoculation onto grafts of MSSA or MRSA. Experimental groups were as follows: Uncontaminated group (control), MSSA- or MRSA-contaminated and untreated groups, MSSA- or MRSA-contaminated groups treated with cefazolin, teicoplanin or vancomycin by one of three regimens (one day, two days, or three days regimen). Grafts were removed 7 days after the implantation and evaluated by using sonication and quantitative blood agar culture.
Results:
Contaminated groups demonstrated graft infections. Cefazolin, teicoplanin and vancomycin profoundly prevented the graft infections in MSSA- or MRSA-contaminated groups. For each antibiotic regimen, the most effective prevention was achieved by the drugs given as three days regimen. For MSSA and MRSA, the order of the effectiveness was as follows: teicoplanin>vancomycin>cefazolin.
Conclusion:
As a prophylactic agent, teicoplanin seems to be more effective than vancomycin and cefazolin against vascular graft infections caused by MSSA and MRSA in rats.
Insights
Teicoplanin, vancomycin, and cefazolin effectively prevented Staphylococcus aureus graft infections in rats. Teicoplanin demonstrated superior prophylactic efficacy compared to vancomycin and cefazolin, especially with a three-day treatment regimen.
Area of Science:
- Infectious Diseases
- Pharmacology
- Surgical Innovation
Background:
- Vascular graft infections pose significant clinical challenges.
- Methicillin-susceptible (MSSA) and -resistant (MRSA) Staphylococcus aureus are common pathogens in graft infections.
- Evaluating prophylactic antibiotic efficacy is crucial for preventing graft complications.
Purpose of the Study:
- To investigate the prophylactic effectiveness of cefazolin, teicoplanin, and vancomycin.
- To compare these antibiotics in a Dacron graft infection model.
- To assess efficacy against both MSSA and MRSA.
Main Methods:
- A prospective, randomized, controlled animal study was conducted.
- Dacron grafts were implanted and inoculated with MSSA or MRSA in rats.
- Antibiotic treatment regimens (one, two, or three days) were administered, followed by graft evaluation via sonication and culture.
Main Results:
- All tested antibiotics (cefazolin, teicoplanin, vancomycin) significantly prevented graft infections.
- A three-day treatment regimen yielded the most effective prevention for all antibiotics.
- The order of prophylactic effectiveness was teicoplanin > vancomycin > cefazolin for both MSSA and MRSA.
Conclusions:
- Teicoplanin appears to be a more effective prophylactic agent than vancomycin and cefazolin.
- These findings support the use of teicoplanin for preventing Staphylococcus aureus vascular graft infections.
- Optimal antibiotic duration is critical for maximizing prophylactic success.
