Skin and Soft Tissue Infections

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Skin and soft tissue infections are a common cause of hospitalization and use of antibiotic therapy, and may result in significant disability. Infections managed by surgeons may vary from simple, noncomplicated cellulitis to severe necrotizing soft tissue infections. The differentiation of necrotizing infections from nonnecrotizing infections is critical to achieving adequate surgical therapy. An understanding of the changing epidemiology of all complicated skin and soft tissue infections is required for selection of appropriate empiric antibiotic therapy.

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Terminology and definitions

A variety of terms are applied to infections of the skin and underlying soft tissue structures. For the purpose of therapeutic clinical trials, the Food and Drug Administration (FDA) uses the term “skin and skin structure infections.”1 The FDA specifically excludes necrotizing deep space infections from clinical trials, however, excluding infections involving the fascial planes and muscle and those infections with the greatest likelihood of adverse outcome.

Additionally, skin and skin structure

Nonnecrotizing skin and soft tissue infections

SSTI may occur with a wide variety of clinical presentations and in numerous clinical settings, with diverse etiologic processes, and with varying severities. Numerous bacteria may be involved in SSTI, with the likelihood of individual pathogens being altered by factors including the inciting disease process and the clinical presentation and setting. Most SSTI infections are generally mild to moderate in severity and include simple cellulitis, folliculitis, furunculosis, and minor

Necrotizing skin and soft tissue infections

NSTI are discussed separately because of (1) the increased severity; (2) the variation of pathogens relative to nonnecrotizing infections; (3) the difficulty and importance of establishing an early diagnosis; and (4) the impact of early, aggressive surgical debridement on outcome. NSTIs are serious infections, producing progressive tissue destruction with significant potential for soft tissue and limb loss and mortality. Despite advances in therapy over the past three decades, the mortality

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