Learning Objectives and Clinical Implications
Define skin and soft tissue infections (SSTIs) and classify them based on clinical presentation and microbial etiology.
Identify less common or “miscellaneous” bacterial pathogens associated with SSTIs (e.g., Actinomyces, Nocardia,
Erysipelothrix rhusiopathiae, Corynebacterium spp., Mycobacterium marinum, and anaerobes). Describe the clinical features and disease patterns associated with these organisms (e.g., nodular lymphangitis, chronic abscesses, granulomatous lesions).
Explain the modes of transmission and risk factors for acquiring these infections (e.g., trauma, immunosuppression, aquatic exposure, animal contact).
Discuss the diagnostic approaches including specimen collection, microscopy, culture techniques, and special stains.
Outline the principles of treatment including empirical and targeted antibiotic therapy and when surgical intervention may be required.
Differentiate between typical pyogenic bacteria and these miscellaneous pathogens in terms of clinical course and management.
Appreciate the importance of early recognition and appropriate referral for atypical or chronic SSTIs.