Airborne particulate size and concentrations in five Thoroughbred training yards in Newmarket (UK).
Authors: Davison Joshua A, Wylie Claire E, McGladdery Charles E, Fettes Connor, Haggett Emily F, Ramzan Pieter H L
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Airborne Particulate Monitoring in Newmarket Thoroughbred Yards Lower airway inflammation in racehorses has long been associated with airborne particulate exposure, yet UK-specific baseline data on stall environments remained scarce until this 2019 investigation of five Newmarket training yards. Researchers deployed nephelometer technology to quantify particulate matter across two seasons and multiple time points, measuring both fine particles (PM2.5, ≤2.5 μm) and coarser fractions (PM10, ≤10 μm) to establish realistic exposure profiles. Winter conditions produced markedly higher concentrations—up to 0.37 mg/m³ for PM2.5 and 0.60 mg/m³ for PM10—compared with summer averages of 0.27 and 0.39 mg/m³ respectively, whilst temporal variation throughout the day also demonstrated statistically significant differences in exposure burden. These findings carry direct relevance for farriers, veterinarians and physiotherapists managing horses with inflammatory airway disease, as they validate seasonal management adjustments and highlight the importance of documenting yard conditions when investigating respiratory or performance issues. The study's methodology establishing standardised monitoring protocols now provides a framework for future investigations into how specific yard variables—bedding type, ventilation design, mucking-out practices and forage quality—influence the particulate environment that either exacerbates or protects lower airway health.
Read the full abstract on PubMed
Practical Takeaways
- •Stall particulate levels vary significantly by season and time of day, suggesting yard management strategies (such as ventilation timing and bedding management) should be adjusted seasonally to minimise exposure to respiratory irritants
- •Higher winter concentrations highlight the need for improved ventilation and dust control during cold months when stalls are typically more closed to conserve heat
- •Baseline particulate data can inform individual yard assessments and help identify which facilities may need targeted environmental modifications to support equine respiratory health
Key Findings
- •Average PM2.5 concentrations ranged from 0.02–0.27 mg/m³ in summer and 0.01–0.37 mg/m³ in winter across five Newmarket training yards
- •Average PM10 concentrations ranged from 0.02–0.39 mg/m³ in summer and 0.02–0.60 mg/m³ in winter
- •Statistically significant effects of season and time of day on particulate concentrations were demonstrated
- •Winter concentrations were generally higher than summer concentrations for both PM2.5 and PM10 fractions