Plasma lipidome of healthy and Rhodococcus equi-infected foals over time.
Authors: Sanclemente Jorge L, Rivera-Velez Sol Maiam, Dasgupta Nairanjana, Horohov David W, Wood Paul L, Sanz Macarena G
Journal: Equine veterinary journal
Summary
# Editorial Summary: Plasma Lipidome in Rhodococcus equi Infection Rhodococcus equi pneumonia presents a clinical dilemma in foal practice: many animals with ultrasonographic lung lesions recover without treatment, yet identifying which foals will progress to clinical disease remains elusive, driving unnecessary antimicrobial use across the industry. Researchers employed untargeted lipidomics—a comprehensive analytical approach measuring hundreds of lipid species simultaneously—to track plasma lipid profiles in healthy foals and those with confirmed R. equi infection over time, seeking biomarkers that might distinguish self-limiting infections from those requiring intervention. The longitudinal lipidome analysis revealed distinct temporal lipid signatures in infected foals compared to controls, with specific lipid classes and molecular species shifting in patterns that correlated with disease severity and clinical outcomes. These findings suggest that plasma lipid profiling could eventually support clinical decision-making by identifying foals at genuine risk of progression, potentially reducing empirical antimicrobial therapy whilst protecting those most vulnerable to severe pneumonia. Further validation of candidate lipid biomarkers may establish a practical diagnostic tool that bridges the gap between ultrasonographic findings and clinical necessity.
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Practical Takeaways
- •Lipidomic profiling may enable identification of foals truly at risk for clinical R. equi pneumonia, potentially reducing unnecessary antimicrobial use in cases with self-limiting infections
- •Longitudinal lipid biomarkers could help clinicians make more informed treatment decisions for foals with ultrasonographic lung lesions
- •This approach may contribute to antimicrobial stewardship in equine practice by distinguishing which infected foals genuinely require therapy
Key Findings
- •Untargeted lipidomics can identify candidate biomarkers to distinguish foals at risk of clinical pneumonia from those with self-healing infections
- •Plasma lipidome changes over time in healthy and R. equi-infected foals, providing potential diagnostic markers
- •Study addresses the clinical challenge of identifying which foals with thoracic lesions require antimicrobial treatment versus those that will spontaneously recover