This trial is active, not recruiting.

Conditions osteomyelitis, methicillin-resistant staphylococcus aureus
Treatments trimethoprim-sulfamethoxazole, vancomycin
Sponsor University of Washington
Start date May 2006
End date May 2011
Trial size 300 participants
Trial identifier NCT00324922, 05-6396-B 01, 27915-B


The primary question of this study is to understand if trimethoprim-sulfamethoxazole (TMP-SMX) is as effective as vancomycin for treating methicillin-resistant Staphylococcus aureus (MRSA) osteomyelitis.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification efficacy study
Intervention model parallel assignment
Masking open label
Primary purpose treatment
(Active Comparator)
trimethoprim/sulfamethoxazole 320/1600 mg po bid
1g iv bid
(Active Comparator)
1g iv bid

Primary Outcomes

Clinical cure at 12 months
time frame: 12 months

Eligibility Criteria

Male or female participants at least 18 years old.

Inclusion Criteria: 1. Culture-proven MRSA, obtained in operating room or sterile biopsy procedure from bone site. The infection and sampling site can either be within bone or a deep soft-tissue site that is contiguous with bone; OR radiographic abnormality consistent with osteomyelitis in conjunction with a positive blood culture for MRSA. 2. Surgical debridement of infection site, as needed. 3. Subject is capable of providing written informed consent. 4. Subject is at least 18 years of age. 5. Subject capable of receiving outpatient parenteral therapy for 12 weeks. Exclusion Criteria: 1. Hypersensitivity to TMP-SMX or vancomycin. 2. S. aureus resistant to TMP-SMX or vancomycin. 3. Osteomyelitis that develops directly from a chronic, open wound. 4. Polymicrobial culture(the only exception is if coagulase-negative staphylococcus is present in the culture and the clinical assessment is that it is a contaminant). 5. Subject has a positive pregnancy test at study enrollment. 6. Convicted felon currently in prison. 7. Baseline renal or hepatic insufficiency that would preclude administration of study drugs. 8. Active injection drug use without safe conditions to administer intravenous antibiotics for 3 months. 9. Anticipated use of antibiotics for greater than 14 days for an infection other than osteomyelitis.

Additional Information

Official title A Prospective, Randomized Trial Comparing Vancomycin With Trimethoprim/Sulfamethoxazole for the Treatment of MRSA Osteomyelitis
Principal investigator Timothy H. Dellitt, MD
Description Treatment of osteomyelitis is hampered by a paucity of evidence from prospective clinical trials with randomized treatment arms. Furthermore, previous randomized or observational trials have enrolled small numbers of subjects and thus often had non-definitive findings. One of the most common causes of osteomyelitis is Staphylococcus aureus. Over the past 10 years, rates of methicillin-resistant S. aureus (MRSA) have risen dramatically. Vancomycin is currently the treatment of choice for treating MRSA. While vancomycin is effective, it is only available in intravenous formulation and has renal and bone marrow toxicities. There is a critical need for effective, oral, cheap drugs for the treatment of MRSA. Trimethoprim-sulfamethoxazole (TMP-SMX) is a drug with several advantageous properties for the treatment of MRSA osteomyelitis. To address this question regarding optimal treatment of MRSA osteomyelitis, we designed a prospective, randomized trial comparing TMP-SMX with vancomycin for the treatment of MRSA osteomyelitis.
Trial information was received from ClinicalTrials.gov and was last updated in July 2009.
Information provided to ClinicalTrials.gov by University of Washington.