In vitro activity of tedizolid and other comparator drugs in methicillin-resistant Staphylococcus aureus isolates in skin and soft tissue infections in seven Colombian hospitals
Abstract
Introduction: Methicillin-resistant Staphylococcus aureus (MRSA) causes severe skin and soft tissue infections in hospitals and, more recently, in the community. Tedizolid is a new second-generation oxazolidinone derivative having greater in vitro potency than linezolid against this type of microorganism.
Objectives: To evaluate the antimicrobial activity of tedizolid and other comparator antibiotics in MRSA isolates causing skin and soft tissue infections in Colombian hospitals.
Materials and methods: We conducted a prospective, multi-center descriptive study in seven tertiary-level hospitals in Colombia along a 12-month period. MRSA isolates were collected from adult patients with skin and soft tissue infections. Tedizolid, linezolid, vancomycin, daptomycin, trimethoprim-sulfamethoxazole, and clindamycin minimum inhibitory concentration (MIC) was determined by ETEST® (bioMérieux).
Results: MRSA isolates were obtained from 102 patients with an average age of 46.8 years of whom 56 (54.9%) were men. Infection was community-acquired in 77 cases (75.4%). Abscess-related samples predominated (69 patients: 67.6%). All isolates were susceptible to tedizolid, linezolid, daptomycin, trimethoprim-sulfamethoxazole, and vancomycin. Tedizolid had greater in vitro activity than linezolid. Tedizolid MIC intervals ranged from 0.125 μg/mL to 0.5 μg/mL while those of linezolid ranged from 1μg/mL to 2μg/mL.
Conclusions: MRSA strains circulating in Colombia are highly susceptible to tedizolid and can be considered a therapeutic alternative for hospitals and/or community-acquired skin and soft tissue infections.
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References
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