Descriptive network analysis of Ontario, Canada equine competitions: implications for disease control.
Authors: Rossi Tanya M, O'Sullivan Terri L, Greer Amy L
Journal: BMC veterinary research
Summary
# Editorial Summary: Network Analysis of Ontario Equestrian Competitions and Disease Control Implications Competition circuits create interconnected pathways through which infectious diseases can spread rapidly among horses across regions, yet little is known about the structural characteristics of these networks in North America. Rossi and colleagues analysed three years (2016–2018) of Equestrian Canada competition data from Ontario to map contact networks at three levels—competitions themselves, individual horses, and venues—and examined whether these networks displayed 'small world' properties (high local clustering combined with short path lengths between distant nodes). The researchers found that Ontario's equestrian competition networks exhibited small-world characteristics, meaning horses from geographically dispersed regions interact through relatively few intermediary connections, creating conditions favourable for rapid disease transmission. Such network topology explains why infectious disease outbreaks in competition horses can spread geographically faster than might be predicted from physical distance alone. For veterinary professionals advising on biosecurity, event management, and outbreak response, these findings underscore the importance of targeted disease surveillance at high-traffic competition venues and the potential value of regional movement restrictions during disease emergencies, since disrupting even a few key competition-to-venue connections could substantially slow disease propagation.
Read the full abstract on PubMed
Practical Takeaways
- •Understanding competition networks helps identify high-risk venues and events where disease control measures should be prioritized to prevent spread across the competitive circuit
- •Biosecurity protocols should account for the interconnected nature of equestrian competitions—horses and personnel moving between events create multiple transmission pathways that require network-level thinking, not just venue-level isolation
- •Event organizers and veterinarians can use network data to target disease surveillance and outbreak response at key nodes (venues/competitions) that connect otherwise separate groups of horses
Key Findings
- •Equestrian Canada competitions in Ontario form contact networks between 2016-2018 that facilitate potential disease transmission between competitions, horses, and venues
- •Network analysis reveals structural characteristics relevant to understanding how infectious diseases could spread through the competitive horse community
- •Competition networks exhibit patterns consistent with 'small world' network properties, suggesting efficient disease dissemination pathways