Necrotizing skin and soft-tissue infections in the intensive care unit Original paper
Researched by:
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Divine Aleru
ID
Divine Aleru
Read MoreI am a biochemist with a deep curiosity for the human microbiome and how it shapes human health, and I enjoy making microbiome science more accessible through research and writing. With 2 years experience in microbiome research, I have curated microbiome studies, analyzed microbial signatures, and now focus on interventions as a Microbiome Signatures and Interventions Research Coordinator.
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Microbes
Microbes
Microbes are microscopic organisms living in and on the human body, shaping health through digestion, vitamin production, and immune protection. When microbial balance is disrupted, disease can occur. This guide explains key microbe types—bacteria, viruses, fungi, protozoa, and archaea—plus major pathogenic and beneficial examples.
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Divine Aleru
Read More
Researched by:
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Divine Aleru
ID
Divine Aleru
Read More
Microbiome Signatures identifies and validates condition-specific microbiome shifts and interventions to accelerate clinical translation. Our multidisciplinary team supports clinicians, researchers, and innovators in turning microbiome science into actionable medicine.
Divine Aleru
What was reviewed?
This review examined the microbiology, pathogenesis, diagnosis, and management of necrotizing skin and soft-tissue infections (NSTIs), focusing on how toxin-producing bacteria cause rapid tissue destruction and systemic illness. The authors explained that these infections occur when pathogenic bacteria invade subcutaneous tissue and fascia, often following trauma or microbiome disruption. Anaerobic pathogens such as Clostridium perfringens produce toxins that damage host cells, impair blood flow, and create hypoxic environments that favor further microbial growth. These infections progress rapidly due to toxin-mediated tissue destruction and microbiome imbalance, requiring urgent diagnosis and intervention.
Who was reviewed?
The review evaluated critically ill patients with NSTIs, including necrotizing fasciitis and gas gangrene, and analyzed microbiological isolates recovered from infected tissues. These infections involved both monomicrobial and polymicrobial microbiome communities. Major microbial associations included toxin-producing Clostridium perfringens, Streptococcus pyogenes, and polymicrobial consortia containing anaerobes and facultative pathogens such as Escherichia coli and Bacteroides fragilis. These pathogens originated from the microbiome or external contamination and became invasive when microbiome stability was disrupted.
What were the most important findings?
The most important finding was that toxin-producing bacteria, particularly Clostridium perfringens, directly drive tissue necrosis through toxin-mediated membrane damage, vascular disruption, and immune evasion. Major microbial associations included toxin production, anaerobic microbiome expansion, and synergistic polymicrobial infection. Alpha-toxin produced by C. perfringens destroys host cell membranes and impairs blood supply, creating conditions that promote bacterial proliferation. Microbiome disruption and reduced oxygen levels further accelerate pathogen expansion and disease severity.
What are the greatest implications of this review?
This review demonstrated that toxin-producing microbiome pathogens are the primary drivers of necrotizing tissue infections. Detection of toxin-producing bacteria represents a key microbiome signature of severe infection risk. Early recognition and targeting toxin-producing pathogens are critical for preventing rapid tissue destruction and systemic disease progression.
Clostridium perfringens
Clostridium perfringens is a fast-growing, Gram-positive, spore-forming anaerobe and a major toxin-mediated pathogen affecting humans and animals. Widely distributed in soil, food, and gastrointestinal microbiota, it causes diseases ranging from food poisoning and antibiotic-associated diarrhoea to life-threatening clostridial myonecrosis. Its pathogenicity is driven by diverse plasmid-encoded toxins, including α-toxin, enterotoxin, and perfringolysin O, while conjugative mobile genetic elements facilitate rapid dissemination of antimicrobial resistance and virulence traits. Genome-informed toxinotyping and molecular surveillance are therefore essential for accurate risk assessment, clinical management, and outbreak control.