Staphylococcus aureus Infections in Diabetic Foot Pathology
Summary
Diabetic foot pathology arises from peripheral neuropathy, vascular insufficiency and hyperglycaemia, which together compromise skin integrity and innate immunity. Ulceration of the foot provides an entry point for microorganisms, with Staphylococcus aureus emerging as the predominant pathogen. S. aureus expresses a repertoire of virulence factors, including adhesins that bind to extracellular matrix components, toxins that damage host tissues and secreted enzymes that facilitate deeper invasion. The ability to form biofilms on wound surfaces further shields bacteria from antimicrobial agents and immune effector cells, fostering chronicity and recurrent infection. Methicillin-resistant S. aureus (MRSA) strains represent a major clinical challenge owing to multidrug resistance. Infection may extend to bone, resulting in osteomyelitis and a heightened risk of lower-limb amputation. Management combines surgical debridement, offloading strategies, targeted antimicrobial therapy guided by susceptibility testing and advanced wound-healing modalities. Nevertheless, the increasing prevalence of antibiotic-resistant and biofilm-associated infections has driven research towards genomic surveys of pathogen populations, studies of bacterial adaptation to diabetic wound-like environments and the development of novel agents aimed at disrupting biofilms or neutralising key virulence determinants.
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Staphylococcus aureus Infections in Diabetic Foot Pathology publication trend
The graph below shows the total number of articles in staphylococcus aureus infections in diabetic foot pathology across all publications each year (not limited to Nature Index journals).
Technical terms
MRSA: Strains of Staphylococcus aureus resistant to methicillin and related β-lactam antibiotics, often associated with limited treatment options.
Biofilm: Structured community of bacteria enclosed in a self-produced extracellular matrix, attached to a surface, which confers protection against antimicrobials and host defences.
Whole genome sequencing: Laboratory technique that determines the entire DNA sequence of an organism’s genome, enabling detailed analysis of genetic relatedness and resistance determinants.
Clonal complex: Group of bacterial strains that share a recent common ancestor, identified by multilocus sequence typing and indicating epidemiological links.
Small colony variant: Slow-growing bacterial phenotype with altered metabolism and enhanced tolerance to antibiotics, implicated in persistent and recurrent infections.
References
- Whole genome sequencing and pan-genome analysis of Staphylococcus/Mammaliicoccus spp. isolated from diabetic foot ulcers and contralateral healthy skin of Algerian patients. BMC Microbiology (2023).
- Methicillin-Resistant Staphylococcus aureus from Diabetic Foot Infections in a Tunisian Hospital with the First Detection of MSSA CC398-t571. Antibiotics (2022).
- Adaptation of Staphylococcus aureus in a Medium Mimicking a Diabetic Foot Environment. Toxins (2021).
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