Strangles case confirmed in Spokane County, Washington

A new strangles case in Spokane County has put Washington equine veterinarians back on alert. The Equine Disease Communication Center reported July 2, 2026 that one horse at a private facility tested positive, with one additional horse considered a suspected carrier; the case is under voluntary quarantine, and the confirmed horse is receiving veterinary care. (equinediseasecc.org)

The report lands in a state that has seen repeated equine infectious disease alerts in recent years, including earlier Spokane County incidents. In March 2024, EDCC reported a strangles case at a Spokane County boarding facility with four exposed horses, and The Horse separately reported another Spokane County strangles alert on June 23, 2026 involving a horse that had not traveled recently, although horses in neighboring stalls had. That pattern matters because horse movement, shared airspace, and indirect contact remain common threads in equine respiratory disease spread. (nwhorsesource.com)

The new EDCC alert offers more detail than the short trade writeups. According to the alert, the referring veterinarian said the pet parent’s mare had been at a breeding facility, returned about two weeks before examination with upper respiratory signs, and was immediately placed back with the affected horse. The mare is suspected to be the carrier. The alert also notes this was the patient’s second positive test, with a previous positive in September 2025 at UC Davis, and records serologic titers collected in March 2026 as part of assessing purpura hemorrhagica risk before immunization. (equinediseasecc.org)

That carrier angle is especially important. EDCC’s strangles fact sheet says horses can incubate and shed Streptococcus equi without obvious clinical signs, may continue shedding for up to six weeks after recovery, and in some cases become long-term periodic shedders that can trigger outbreaks when introduced to new herds. The organization also notes that outbreaks are especially common at facilities with frequent horse traffic and recommends quarantining new horses for up to three weeks, alongside strict hygiene and equipment disinfection. (static1.squarespace.com)

There does not appear to be extensive public expert commentary specific to this Spokane case beyond the EDCC and Equine Network summaries, but the regulatory framework is clear. Washington administrative code identifies strangles as a contagious upper respiratory infection of equines caused by Streptococcus equi, and says horses that test positive are managed by the state veterinarian on a case-by-case basis. EDCC also describes its role as providing open-access infectious disease alerts to help the industry prevent and mitigate spread. (lawfilesext.leg.wa.gov)

Why it matters: For veterinary professionals, this is less a story about a single sick horse than a case study in surveillance, movement history, and carrier management. A suspected carrier returning from a breeding setting raises practical questions about isolation protocols on arrival, diagnostic follow-up for exposed stablemates, and communication with referring barns and recent contacts. It also underscores why a horse that looks clinically improved, or even clinically normal, can still present herd-level risk. In mixed-use facilities, ambulatory practices may need to reinforce temperature monitoring, segregation plans, cleaning protocols for shared waterers and tack, and criteria for when to test versus when to maintain quarantine. (equinediseasecc.org)

There’s also a client communication layer. Pet parents may focus on the sick horse in front of them, while veterinarians have to manage the broader epidemiology: latent shedding, environmental contamination, and the possibility that one returned horse can expose an entire barn. Because treatment decisions and antibiotic use in strangles can affect immunity and recovery, EDCC emphasizes veterinarian-directed case management rather than one-size-fits-all intervention. (static1.squarespace.com)

What to watch: The next meaningful developments will be whether the suspected mare is confirmed as a carrier, whether additional horses at the facility test positive, and whether WSDA or EDCC updates the alert from a single-facility voluntary quarantine to a broader exposure investigation. Given EDCC’s real-time alert model, any change in case count or status should surface there first. (equinediseasecc.org)