Authors: Pyzik Ewelina, Urban-Chmiel Renata, Kurek Łukasz, Herman Klaudia, Stachura Rafał, Marek Agnieszka
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary Pathogenic *Staphylococcus* species pose a significant clinical challenge in dairy cattle, particularly in cases of mastitis and limb infections, yet antibiotic resistance among these isolates is increasingly problematic—94% of strains in this research displayed resistance to neomycin and 87% to spectinomycin. Researchers isolated bacteriophages from the housing environment of infected cattle and characterised them using multiple methods (TEM microscopy, PCR, and phenotypic analysis), identifying 15 phage isolates belonging to the Myoviridae-like and Siphoviridae-like families within the class Caudoviricetes. Three Myoviridae-like phages demonstrated particularly broad-spectrum lytic activity against the resistant *Staphylococcus* strains tested, suggesting viable potential as antimicrobial alternatives in a therapeutic landscape increasingly constrained by antibiotic resistance. For equine and farm animal practitioners, these findings support further investigation into phage therapy as an adjunctive or alternative approach to managing refractory staphylococcal infections in limbs and hooves, particularly where conventional antibiotics have proven ineffective. Whilst this work was conducted in cattle, the cross-species relevance of both the resistance patterns and phage biology warrants attention to emerging phage-based protocols for similar infections in equine practice.
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Practical Takeaways
- •Not applicable to equine practice - this study focuses exclusively on dairy cattle infections and bacteriophage therapy
- •Research demonstrates potential for phage-based alternatives to antibiotics in livestock, which may inform future therapeutic approaches in other species
- •High antibiotic resistance rates in cattle pathogens highlight the need for alternative treatment strategies beyond conventional antibiotics
Key Findings
- •94% of Staphylococcus spp. isolates (15/16) showed resistance to neomycin, and 87% were resistant to spectinomycin
- •Bacteriophages were identified as Caudoviricetes belonging to Myoviridae-like (6) and Siphoviridae-like (9) families
- •Three Myoviridae-like bacteriophages demonstrated the broadest spectrum of activity against tested Staphylococcus spp. strains
- •Cefuroxime and vancomycin were identified as the most effective antibiotics against the isolated strains