Weekly Disease Roundup: September 7 – September 14, 2026
As of September 14, 2026, Equine Alert recorded 14 new disease alerts across 10 states over the past week, led by West Nile Virus.
This Week at a Glance
| Metric | This Week | Last Week | Change |
|---|---|---|---|
| Total Alerts | 14 | 30 | -53% |
| States Affected | 10 | — | — |
| Diseases Reported | 7 | — | — |
Activity by Disease
| Disease | Alerts |
|---|---|
| West Nile Virus | 8 |
| Equine Infectious Anemia | 1 |
| Equine Herpesvirus-1 (EHV-1) | 1 |
| New World Screwworm | 1 |
| Pigeon Fever | 1 |
| Strangles | 1 |
| Eastern Equine Encephalitis | 1 |
Activity by State
| State | Alerts | Primary Disease |
|---|---|---|
| Utah | 2 | West Nile Virus |
| California | 2 | West Nile Virus |
| Colorado | 2 | West Nile Virus |
| Florida | 2 | West Nile Virus |
| Wisconsin | 1 | Equine Herpesvirus-1 (EHV-1) |
| Texas | 1 | New World Screwworm |
| Ontario | 1 | West Nile Virus |
| Wyoming | 1 | Pigeon Fever |
| Washington | 1 | Strangles |
| Michigan | 1 | Eastern Equine Encephalitis |
This Week's Alerts
- September 11 | West Nile Virus | Cache, Utah
- September 11 | West Nile Virus | Amador, California
- September 11 | Equine Infectious Anemia | San Benito, California — official quarantine
- September 10 | West Nile Virus | Montrose, Colorado
- September 10 | West Nile Virus | Pueblo, Colorado
- September 10 | West Nile Virus | Wasatch, Utah
- September 10 | Equine Herpesvirus-1 (EHV-1) | Green Lake, Wisconsin — voluntary quarantine
- September 10 | New World Screwworm | Presidio, Texas
- September 9 | West Nile Virus | Regional Municipality of Durham, Ontario
- September 9 | Pigeon Fever | Albany, Wyoming — voluntary quarantine
- September 9 | Strangles | Whatcom, Washington — voluntary quarantine
- September 8 | West Nile Virus | Suwannee, Florida
- September 8 | West Nile Virus | Suwannee, Florida
- September 8 | Eastern Equine Encephalitis | Roscommon, Michigan
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).