Weekly Disease Roundup: September 21 – September 28, 2026
As of September 28, 2026, Equine Alert recorded 15 new disease alerts across 9 states over the past week, led by Pigeon Fever.
This Week at a Glance
| Metric | This Week | Last Week | Change |
|---|---|---|---|
| Total Alerts | 15 | 23 | -35% |
| States Affected | 9 | — | — |
| Diseases Reported | 6 | — | — |
Activity by Disease
| Disease | Alerts |
|---|---|
| Pigeon Fever | 5 |
| West Nile Virus | 4 |
| Strangles | 2 |
| Equine Infectious Anemia | 2 |
| Equine Herpesvirus-1 (EHV-1) | 1 |
| Potomac Horse Fever | 1 |
Activity by State
| State | Alerts | Primary Disease |
|---|---|---|
| Oregon | 5 | Pigeon Fever |
| Maryland | 2 | Equine Herpesvirus-1 (EHV-1) |
| Wisconsin | 2 | Strangles |
| Florida | 1 | West Nile Virus |
| Tennessee | 1 | Potomac Horse Fever |
| Utah | 1 | West Nile Virus |
| Indiana | 1 | West Nile Virus |
| Washington | 1 | Equine Infectious Anemia |
| Ontario | 1 | Equine Infectious Anemia |
This Week's Alerts
- September 25 | Pigeon Fever | Josephine, Oregon — voluntary quarantine
- September 24 | Pigeon Fever | Deschutes, Oregon — official quarantine
- September 24 | Equine Herpesvirus-1 (EHV-1) | Baltimore, Maryland
- September 24 | West Nile Virus | Cecil, Maryland
- September 23 | West Nile Virus | Suwannee, Florida
- September 23 | Potomac Horse Fever | Washington, Tennessee
- September 23 | West Nile Virus | Box Elder, Utah
- September 23 | Strangles | Richland, Wisconsin — voluntary quarantine
- September 23 | Pigeon Fever | Umatilla, Oregon — official quarantine
- September 23 | Strangles | Dane, Wisconsin — voluntary quarantine
- September 23 | West Nile Virus | Adams, Indiana
- September 23 | Pigeon Fever | Deschutes, Oregon — official quarantine
- September 23 | Pigeon Fever | Deschutes, Oregon — official quarantine
- September 22 | Equine Infectious Anemia | Yakima, Washington — official quarantine
- September 22 | Equine Infectious Anemia | Perth East, Ontario — official quarantine
Protect Your Horses
Disease activity shifts week to week. A few habits go a long way:
- Check destination states for disease activity before you travel or compete
- Isolate returning horses for 14–21 days when possible
- Monitor temperatures daily — fever is often the first sign of EHV-1
- Avoid nose-to-nose contact and don't share water buckets or equipment at events
- Inspect wounds daily and keep them clean and covered
Want alerts the moment a new outbreak is reported in your state? Sign up for free email alerts or explore the interactive outbreak map. Data sourced from the Equine Disease Communication Center (EDCC).