Cutaneous infections: microbiologic and epidemiologic considerations

Area of Science:

• Dermatology
• Microbiology
• Immunology

Background:

• The skin's normal bacterial flora, including diphtheroids and staphylococci, is a key defense against pathogens.
• Cutaneous infections can range from localized impetigo in healthy individuals to severe, disseminated disease in immunocompromised hosts.
• Skin infections can arise from endogenous flora, external pathogens, or systemic conditions, manifesting in diverse ways.

Purpose of the Study:

• To review the spectrum of cutaneous infections.
• To discuss the role of microbial agents in skin disease.
• To highlight the increasing pathogenicity of coagulase-negative staphylococci.

Main Methods:

• Literature review of cutaneous infections.
• Analysis of microbial roles in skin pathology.
• Case study of recurrent cellulitis post-coronary artery bypass graft.

Main Results:

• Skin infections vary widely based on host immunity and microbial factors.
• Opportunistic pathogens like gram-negative bacilli and fungi pose risks to immunosuppressed individuals.
• Coagulase-negative staphylococci are increasingly implicated in severe infections, especially in vulnerable patients.

Conclusions:

• Understanding the interplay between skin microbiota, host defenses, and pathogens is crucial for managing cutaneous infections.
• The presentation of skin disease is highly dependent on the causative agent and host status.
• Emerging resistance and pathogenicity of certain bacteria necessitate ongoing vigilance and research.