Molecular Characterization of Staphylococcus aureus in Bovine Mastitis
Summary
The molecular characterisation of Staphylococcus aureus in bovine mastitis combines epidemiological surveillance with high-resolution genotyping to elucidate strain diversity, antimicrobial-resistance mechanisms and virulence determinants. Approaches such as whole-genome sequencing, multi-locus sequence typing and spa typing are used to trace clonal lineages, detect resistance genes (mecA, blaZ, tetK) and profile exotoxin and adhesion-factor repertoires. These data inform on transmission dynamics within and between herds, identify emerging methicillin-resistant and livestock-associated lineages, and underpin risk assessment for zoonotic spill-over. Integrating molecular profiles with phenotypic assays for biofilm formation and toxin production enhances understanding of pathogenic potential and guides targeted interventions. Global surveys have highlighted regional predominance of particular clonal complexes (for example CC97, CC1, CC398), the rise of oxacillin-susceptible mecA-positive variants and the dissemination of multidrug-resistant, high-virulence strains. Ultimately, molecular insights drive improvements in diagnostics, vaccine design and antimicrobial stewardship, contributing to more sustainable dairy production and reduced public-health risk.
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Molecular Characterization of Staphylococcus aureus in Bovine Mastitis publication trend
The graph below shows the total number of articles in molecular characterization of staphylococcus aureus in bovine mastitis across all publications each year (not limited to Nature Index journals).
Technical terms
Whole-genome sequencing: Comprehensive analysis of an organism’s complete DNA sequence to identify genetic variations and resistance determinants.
Multi-locus sequence typing (MLST): Characterisation of bacterial isolates by sequencing internal fragments of multiple housekeeping genes to assign sequence types.
Pulsed-field gel electrophoresis (PFGE): Separation of large DNA fragments after restriction enzyme digestion to generate strain-specific fingerprint patterns.
Biofilm: Structured community of bacteria adherent to surfaces and encased in extracellular polymeric substances, conferring tolerance to antimicrobials.
Virulence factor: Molecule produced by a pathogen that enhances its ability to colonise, evade host defences or cause disease.
References
- Investigation of Various Toxigenic Genes and Antibiotic and Disinfectant Resistance Profiles of Staphylococcus aureus Originating from Raw Milk. Foods (2024).
- Partnering essential oils with antibiotics: proven therapies against bovine Staphylococcus aureus mastitis. Frontiers in Cellular and Infection Microbiology (2023).
- Genetic and Phenotypic Characterization of Subclinical Mastitis-Causing Multidrug-Resistant Staphylococcus aureus. Antibiotics (2023).
- High Incidence of Oxacillin-Susceptible mecA-Positive Staphylococcus aureus (OS-MRSA) Associated with Bovine Mastitis in China. PLOS ONE (2014).
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