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Bone or Joint InfectionPhase 2NCT03723551

Study to Assess Safety, Tolerability and Efficacy of Afabicin in The Treatment of Participants With Bone or Joint Infection Due to Staphylococcus

A Phase 2 study testing Afabicin, Cefazolin and Vancomycin in people with Bone or Joint Infection, run by Debiopharm International SA at 19 sites in 3 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is a randomized, active-controlled, open-label study to assess the safety, tolerability and efficacy of Afabicin in the treatment of participants with bone or joint infection due to Staphylococcus aureus [both methicillin-susceptible S. aureus (MSSA) and methicillin-resistant S. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Bone or Joint Infection
What is being tested?
Afabicin, Cefazolin and Vancomycin
Could I receive a placebo?
No, everyone receives an active treatment
How many people
67 participants
Where
19 sitesin 3 countries
Study dates
20 Feb 2019to 23 Apr 2025
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Able to provide written informed consent and to comply with study procedures.
  • Diagnosis of bone or joint infection which fulfils the following conditions: a) Infection is due to S. aureus (MSSA or MRSA) and/or CoNS only; and, b) Participants had received no more than 7 days of empiric antibiotics prior to initiating treatment with study drug unless the pathogen isolated was resistant to the administered empiric antibiotics; and, c) Biofilm is not considered to be yet established and/or has been mechanically eradicated; and, d) Infection is not associated with an ischiatic or a sacral osteomyelitis; and e) Infection can involve periosteal or soft tissue.

Who cannot join

  • Presence of co-infection with non-staphylococcal bacteria at the affected joint or bone site, or in the blood.
  • Participants at an increased risk of developing liver injury.
  • Participants who have medical conditions that increase the risk of QT prolongation.
  • Medical history within the previous 3 months of: myocardial infarction, unstable angina pectoris, coronary artery or cerebral revascularization procedure or stroke, ventricular tachycardia, multifocal ventricular ectopics requiring treatment, or any other clinically relevant symptomatic ventricular arrhythmias.
  • Documented history of alcohol or drug abuse within the previous 12 months.
  • For patients with DFO:
Show all 11Show fewer
  • Severe peripheral arterial disease (PAD) requiring revascularization; however, patients with peripheral artery disease are eligible for inclusion, provided they have undergone successful revascularization or it has been deemed unnecessary by a vascular surgeon
  • Necrotizing fasciitis or gangrene requiring complete lower extremity amputation (of all infected bone and soft tissue).
  • Patients with Charcot foot (suspected neuro-osteoarthropathy according to Investigator's judgment).
  • Need for digital amputation.
  • Life expectancy of less than 1 year.

Trial locations and contacts

19 sites in 3 countries.

19 sites in 3 countries

Ukraine9 sites
  • Dnipropetrovsk Regional Clinical Hospital

    Dnipro, 49027

  • Regional Clinical Hospital under Ivano-Frankivsk Regional Council

    Ivano-Frankivsk, 76008

  • Kharkiv Regional Clinical Traumatology Hospital

    Kharkiv, 61176

  • Institute of Traumatology and Orthopedics

    Kyiv, 01601

  • Kyiv Regional Clinical Hospital

    Kyiv, 04107

  • Kyiv City Clinical Hospital #8 under the Executive Body of Kyiv City Council (Kyiv City State Administration)

    Kyiv

  • Vinnytsya Regional Clinical Hospital

    Vinnytsia, 21028

  • Lviv Regional Hospital of Veterans of Wars and Repressed after Yurii Lypa

    Vynnyky, 79495

  • City Hospital #9 under Zaporizhia City Council

    Zaporizhia, 69065

Other trials in Ukraine

Georgia7 sites
  • Georgian Clinics JSC

    Akhalts'ikhe, 0800

  • West Georgia Medical Center LLC

    Kutaisi, 4600

  • Malkhaz Katsiashvili Multiprofile Emergency Medicine Center LLC

    Tbilisi, 0101

  • LEPL The First University Clinic of Tbilisi State Medical University

    Tbilisi, 0141

  • Tbilisi State Medical University And Ingorokva High Medical Technology University Clinic LLC

    Tbilisi, 0144

  • Academician Vakhtang Bochorishvili Clinic LTD

    Tbilisi, 0160

  • Caucasus Medical Center LLC

    Tbilisi, 0186

Other trials in Georgia

South Africa3 sites
  • Worthwhile Clinical Trials, Lakeview Hospital

    Benoni, 1500

  • Clinical Research Unit, University of Pretoria

    Pretoria, 0002

  • Global Clinical Trials (Pty) Ltd

    Pretoria, 0157

Other trials in South Africa

About this study

Official title: Randomized Open-label Active-controlled Study to Assess the Safety, Tolerability, and Efficacy of Afabicin IV/Oral in the Treatment of Patients With Bone or Joint Infection Due to Staphylococcus

This is a randomized, active-controlled, open-label study to assess the safety, tolerability and efficacy of Afabicin in the treatment of participants with bone or joint infection due to Staphylococcus aureus [both methicillin-susceptible S. aureus (MSSA) and methicillin-resistant S. aureus (MRSA)] and/or coagulase-negative staphylococci (CoNS) and to compare it to standard of care (SoC).

Being tested
Afabicin, Cefazolin, Vancomycin, Linezolid, Clindamycin

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AfabicinDrug

    Administered intravenously and orally.

  • CefazolinDrug

    Administered intravenously.

  • VancomycinDrug

    Administered intravenously.

  • LinezolidDrug

    Administered intravenously and orally.

  • ClindamycinDrug

    Administered intravenously and orally.

Study groups in NCT03723551
Study groupRoleWhat they receive
Part A: Afabicin: Cohort 1ExperimentalParticipants received afabicin intravenously (IV) at a dose of 160 milligrams (mg), twice daily (BID), followed by a switch to oral afabicin at a dose of 240 mg, BID, for 2-3 weeks.
Receives: Drug: Afabicin
Part A: Afabicin: Cohort 2ExperimentalParticipants received afabicin IV at a dose of 160 mg, BID, followed by a switch to oral afabicin at a dose of 240 mg, BID, for 3-6 weeks.
Receives: Drug: Afabicin
Part A: SoC: Cohort 1Active comparatorParticipants with oxacillin-/methicillin-susceptible staphylococci were administered with either cefazolin or vancomycin or linezolid or clindamycin, IV or linezolid or clindamycin, orally; participants with oxacillin-/methicillin-resistant staphylococci were administered either vancomycin or clindamycin or linezolid, IV or linezolid or clindamycin, orally, as part of SoC in accordance with local practice and applicable treatment guidelines without exceeding the maximum dosing schedule.
Receives: Drug: Cefazolin; Drug: Vancomycin; Drug: Linezolid; Drug: Clindamycin
Part A: SoC: Cohort 2Active comparatorParticipants with oxacillin-/methicillin-susceptible staphylococci were administered with either cefazolin or vancomycin or linezolid or clindamycin, IV or linezolid or clindamycin, orally; participants with oxacillin-/methicillin-resistant staphylococci were administered either vancomycin or clindamycin or linezolid, IV or linezolid or clindamycin, orally, as part of SoC in accordance with local practice and applicable treatment guidelines without exceeding the maximum dosing schedule.
Receives: Drug: Cefazolin; Drug: Vancomycin; Drug: Linezolid; Drug: Clindamycin
Part B: Afabicin: Cohort 1ExperimentalParticipants received afabicin IV at a dose of 55 mg, BID, followed by a switch to oral afabicin at a dose of 80 mg, BID, for 2-3 weeks.
Receives: Drug: Afabicin
Part B: Afabicin: Cohort 2ExperimentalParticipants received afabicin IV at a dose of 55 mg, BID, followed by a switch to oral afabicin at a dose of 80 mg, BID, for 3-6 weeks.
Receives: Drug: Afabicin
Part B: SoC: Cohort 1Active comparatorParticipants with oxacillin-/methicillin-susceptible staphylococci were administered with either cefazolin or vancomycin or linezolid or clindamycin, IV or linezolid or clindamycin, orally; participants with oxacillin-/methicillin-resistant staphylococci were administered either vancomycin or clindamycin or linezolid, IV or linezolid or clindamycin, orally, as part of SoC in accordance with local practice and applicable treatment guidelines without exceeding the maximum dosing schedule.
Receives: Drug: Cefazolin; Drug: Vancomycin; Drug: Linezolid; Drug: Clindamycin
Part B: SoC: Cohort 2Active comparatorParticipants with oxacillin-/methicillin-susceptible staphylococci were administered with either cefazolin or vancomycin or linezolid or clindamycin, IV or linezolid or clindamycin, orally; participants with oxacillin-/methicillin-resistant staphylococci were administered either vancomycin or clindamycin or linezolid, IV or linezolid or clindamycin, orally, as part of SoC in accordance with local practice and applicable treatment guidelines without exceeding the maximum dosing schedule.
Receives: Drug: Cefazolin; Drug: Vancomycin; Drug: Linezolid; Drug: Clindamycin

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)

    Adverse Event (AE) is defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to this medicinal product. TEAE is any undesirable event either not present prior to medical treatment or worsening (in intensity or frequency) following treatment. SAE is defined as any untoward medical occurrence that at any dose: results in death; is life-threatening (i.e., puts the patient at immediate risk of death); requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect, or is otherwise medically significant.

    Measured: Up to Day 142

  2. Number of Participants With Grade Shift From Baseline in Hematology Parameters Based on National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) Version (v) 4.03

    Laboratory abnormalities were graded according to NCI CTCAE v4.03. Grade 0 indicates a normal value; Grades 1-4 represent increasing severity of abnormalities outside the normal range. "High" and "Low" indicate values above and below the normal range, respectively. At baseline (last assessment prior to randomization), both "High, Grade 0" and "Low, Grade 0" indicate normal values and identify the direction of the subsequent post-baseline shift. Participants were evaluated separately for High and Low shifts. Participant could contribute to both analyses if shifts occurred in opposite directions at different assessments. These categories are not mutually exclusive; therefore, counts should not be summed across directions, as they may exceed the number of participants analyzed. Participant could not be classified as both High and Low at the same assessment. Only categories with at least one participant showing a shift were reported.

    Measured: Up to Day 142

  3. Number of Participants With Grade Shift From Baseline in Clinical Chemistry Parameters Based on NCI-CTCAE v4.03

    Laboratory abnormalities were graded according to NCI CTCAE v4.03. Grade 0 indicates a normal value; Grades 1-4 represent increasing severity of abnormalities outside the normal range. "High" and "Low" indicate values above and below the normal range, respectively. At baseline (last assessment prior to randomization), both "High, Grade 0" and "Low, Grade 0" indicate normal values and identify the direction of the subsequent post-baseline shift. Participants were evaluated separately for High and Low shifts. Participant could contribute to both analyses if shifts occurred in opposite directions at different assessments. These categories are not mutually exclusive; therefore, counts should not be summed across directions, as they may exceed the number of participants analyzed. Participant could not be classified as both High and Low at the same assessment. Only categories with at least one participant showing a shift were reported.

    Measured: Up to Day 142

  4. Number of Participants With Grade Shift From Baseline in Electrolyte Parameters Based on NCI-CTCAE v4.03

    Laboratory abnormalities were graded according to NCI CTCAE v4.03. Grade 0 indicates a normal value; Grades 1-4 represent increasing severity of abnormalities outside the normal range. "High" and "Low" indicate values above and below the normal range, respectively. At baseline (last assessment prior to randomization), both "High, Grade 0" and "Low, Grade 0" indicate normal values and identify the direction of the subsequent post-baseline shift. Participants were evaluated separately for High and Low shifts. Participant could contribute to both analyses if shifts occurred in opposite directions at different assessments. These categories are not mutually exclusive; therefore, counts should not be summed across directions, as they may exceed the number of participants analyzed. Participant could not be classified as both High and Low at the same assessment. Only categories with at least one participant showing a shift were reported.

    Measured: Up to Day 142

  5. Number of Participants With Grade Shift From Baseline in Coagulation Parameters Based on NCI-CTCAE v4.03

    Laboratory abnormalities were graded according to NCI CTCAE v4.03. Grade 0 indicates a normal value; Grades 1-4 represent increasing severity of abnormalities outside the normal range. "High" and "Low" indicate values above and below the normal range, respectively. At baseline (last assessment prior to randomization), both "High, Grade 0" and "Low, Grade 0" indicate normal values and identify the direction of the subsequent post-baseline shift. Participants were evaluated separately for High and Low shifts. Participant could contribute to both analyses if shifts occurred in opposite directions at different assessments. These categories are not mutually exclusive; therefore, counts should not be summed across directions, as they may exceed the number of participants analyzed. Participant could not be classified as both High and Low at the same assessment. Only categories with at least one participant showing a shift were reported.

    Measured: Up to Day 142

  6. Number of Participants With Post-baseline Clinically Significant Urinalysis Abnormalities

    Clinical significance of abnormalities in urinalysis was determined based on the investigator's discretion. Baseline is defined as the last assessment prior to the randomization.

    Measured: Up to Day 142

Secondary outcomes (1)
  1. Percentage of Participants With Clinical Response

    Clinical response was based on the improvement of disease-specific signs and symptoms. Responders are defined as participants meeting all the following criteria: improvement of disease-specific signs and symptoms and no new signs, symptoms or complications attributable to the initial infection; No evidence of drainage, sinus tract formation or infection-related bone instability; No requirement for subsequent antibiotics with activity against Staphylococcus to treat the initial infection after the start of study treatment; Microbiological eradication of the baseline pathogen (if post-baseline sample[s] are available); Imaging test at 12 weeks post-EOT showing no worsening of baseline pathology or presence of signs indicating resolution or healing of the infection. Percentages are rounded off.

    Measured: Part A: At Day 8, EOT (up to Day 22), 4-weeks post-EOT (up to Day 50), and 12-weeks post-EOT (up to Day 130); Part B: At Day 8, Day 28, Day 42, EOT (up to Day 43), 4-weeks post-EOT (up to Day 73), and 12-weeks post-EOT (up to Day 142)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted29 Oct 2018
  2. Study start20 Feb 2019
  3. Primary completion23 Apr 2025
  4. Study completion23 Apr 2025

Why it stopped: This trial was concluded for strategic reasons.

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
67 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03723551
Sponsor's protocol ID
Debio 1450-BJI-205
Status last verified
Sep 2026
First submitted
26 Oct 2018
Last updated
9 Sep 2026
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Afabicin, Cefazolin and Vancomycin in people with Bone or Joint Infection, run by Debiopharm International SA at 19 sites in 3 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 9 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 19 sites in Ukraine, Georgia, South Africa. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 9 Sep 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs) (time frame: Up to Day 142). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Sep 2026.

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