Oritavancin Versus IV Vancomycin for the Treatment of Participants With Acute Bacterial Skin and Skin Structure Infection (SOLO I)

Inclusion Criteria

Participants were included in the study if they met all of the following inclusion criteria:

• Males or females ≥18 years old
• Diagnosis of ABSSSI suspected or confirmed to be caused by a gram-positive pathogen requiring at least 7 days of IV therapy
• An ABSSSI included 1 of the following infections: wound infections, cellulitis/erysipelas, major cutaneous abscess
• ABSSSI must have presented with at least 2 local signs and symptoms and at least 1 sign of systemic inflammation (unless >70 years of age).
• Able to give informed consent and willing to comply with all required study procedures

Exclusion Criteria

Participants were excluded from the study if any of the following exclusion criteria applied prior to randomization:

• Prior systemic or topical antibacterial therapy with activity against suspected or proven gram-positive pathogens within the preceding 14 days unless:
• The causative gram-positive pathogen(s) isolated from the ABSSSI site was/were resistant in vitro to the antibacterial(s) that was/were administered with documented clinical progression.
• Documented failure to previous ABSSSI antibiotic therapy was available. Documentation of treatment failure must have been recorded.
• Participant received a single dose of a short-acting antibacterial therapy 3 or more days before randomization.
• Infections associated with, or in close proximity to, a prosthetic device
• Severe sepsis or refractory shock
• Known or suspected bacteremia at time of Screening
• ABSSSI due to or associated with any of the following:
• Infections suspected or documented to be caused by gram-negative pathogens
• Wound infections (surgical or traumatic) and abscesses with only gram-negative pathogens
• Diabetic foot infections
• Concomitant infection at another site not including a secondary ABSSSI lesion
• Infected burns
• A primary infection secondary to a pre-existing skin disease with associated inflammatory changes
• Decubitus or chronic skin ulcer, or ischemic ulcer due to peripheral vascular disease
• Any evolving necrotizing process gangrene or infection suspected or proven to be caused by Clostridium species
• Infections known to be caused by a gram-positive organism with a vancomycin minimum inhibitory concentration >2 micrograms/milliliter or clinically failing prior therapy with glycopeptides
• Catheter site infections
• Allergy or intolerance to aztreonam or metronidazole in a participant with suspected or proven polymicrobial wound infection involving gram-negative and/or anaerobic bacteria
• Was currently receiving chronic systemic immunosuppressive therapy
• Acquired immunodeficiency syndrome with cluster of differentiation 4 count <200 cells/cubic millimeter
• Neutropenia
• Significant or life-threatening condition that would confound or interfere with the assessment of the ABSSSI
• Women who were pregnant or nursing
• History of immune-related hypersensitivity reaction to glycopeptides
• Participants that required anticoagulant monitoring with an activated partial thromboplastin time
• Contraindication to vancomycin
• Participants unwilling to forego blood and/or blood product donation
• Treatment with investigational medicinal product within 30 days before enrollment and for the duration of the study
• Investigational device present, or removed <30 days before enrollment, or presence of device-related infection
• Participants unlikely to adhere to the protocol, comply with study drug administration, or complete the clinical study
• Severe hepatic disease
• Presence of hyperuricemia
• Unwilling to refrain from chronic use of any medication with antipyretic properties