Ceftobiprole in the Treatment of Patients With Staphylococcus Aureus Bacteremia

A Randomized, Double-blind, Multi-center Study to Establish the Efficacy and Safety of Ceftobiprole Medocaril Compared to Daptomycin in the Treatment of Staphylococcus Aureus Bacteremia, Including Infective Endocarditis

The purpose of this study was to compare the efficacy and safety of ceftobiprole medocaril versus a comparator in the treatment of patients with complicated Staphylococcus aureus bacteremia (SAB).

Patients were randomized 1:1 to ceftobiprole or the comparator regimen. Randomization was stratified by study site, dialysis status, and prior antibacterial treatment use within 7 days before randomization.

The three phases of the study were:

1. Screening assessments of up to 72 hours prior to randomization
2. Randomization and subsequent active treatment with intravenous (i.v.) study drug (ceftobiprole or daptomycin ± aztreonam).
3. Post-treatment, comprising an end of trial (EOT) visit (within 72 hours of last study-drug administration), Day 35 (± 3 days), Day 42 (± 3 days), and a post-treatment evaluation (PTE) visit on Day 70 (± 5 days) post-randomization.

Inclusion Criteria:

• Male or female ≥ 18 years of age

• Staphylococcus aureus bacteremia (SAB), based on at least one positive blood culture obtained within the 72 h prior to randomization

• At least one of the following signs or symptoms of bacteremia:

  1. fever (e.g.≥ 38 °C/100.4 °F measured orally)
  2. white blood cell count > 10,000 or < 4,000 cells/µL, or > 10% immature neutrophils (bands)
  3. tachycardia (heart rate > 90 bpm)
  4. hypotension (systolic blood pressure < 90 mmHg)

• At least one of the following:

  1. SAB in patients undergoing chronic intermittent hemodialysis or peritoneal dialysis
  2. Persistent SAB
  3. Definite native-valve right-sided infective endocarditis by Modified Duke's Criteria
  4. Other forms of complicated SAB
  5. Osteomyelitis (including vertebral, sternal, or long-bone osteomyelitis)
  6. Epidural or cerebral abscess

• Other inclusion criteria have been applied

Exclusion Criteria:

• Treatment with potentially effective (anti-staphylococcal) systemic antibacterial treatment for more than 48 h within the 7 days prior to randomization; Exception: Documented failure of bloodstream clearance
• Bloodstream or non-bloodstream concomitant infections with Gram-negative bacteria that are known to be non-susceptible to either ceftobiprole or aztreonam
• Left-sided infective endocarditis
• Prosthetic cardiac valves or valve support rings, cardiac pacemakers, automatic implantable cardioverter-defibrillator, or left-ventricular assist devices
• Community- or hospital-acquired pneumonia
• Opportunistic infections within 30 days prior to randomization, where the underlying cause of these infections is still active
• Requirement for continuous renal-replacement therapy
• Women who are pregnant or nursing
• Other exclusion criteria have been applied