Outbreak Summary for 2023
813 alerts posted.
| Disease | State/Province | Confirmed |
| Botulism | Louisiana | 48 |
Eastern Equine Encephalitis 72 Cases | Arizona | 1 |
| Connecticut | 1 | |
| Florida | 17 | |
| Georgia | 6 | |
| Maine | 3 | |
| Michigan | 1 | |
| New Jersey | 2 | |
| New York | 9 | |
| North Carolina | 7 | |
| Ontario | 18 | |
| Quebec | 2 | |
| Rhode Island | 1 | |
| South Carolina | 4 | |
Equine Herpesvirus- Abortion 2 Cases | Idaho | 1 |
| Ontario | 1 | |
Equine Herpesvirus- Neurologic 71 Cases | Alberta | 1 |
| Arizona | 1 | |
| California | 12 | |
| Colorado | 5 | |
| Florida | 2 | |
| Illinois | 2 | |
| Kentucky | 0 | |
| Maine | 4 | |
| Massachusetts | 1 | |
| Minnesota | 2 | |
| Missouri | 1 | |
| Montana | 5 | |
| Nevada | 2 | |
| Nova Scotia | 1 | |
| Oklahoma | 1 | |
| Ontario | 9 | |
| Oregon | 3 | |
| Pennsylvania | 1 | |
| Quebec | 2 | |
| Texas | 4 | |
| Virginia | 10 | |
| Washington | 1 | |
| Wisconsin | 1 | |
Equine Herpesvirus- Respiratory 10 Cases | Maryland | 1 |
| North Dakota | 2 | |
| Oregon | 1 | |
| Pennsylvania | 1 | |
| Quebec | 1 | |
| Tennessee | 1 | |
| Wisconsin | 3 | |
Equine Infectious Anemia 78 Cases | Alberta | 3 |
| Arizona | 2 | |
| British Columbia | 6 | |
| California | 7 | |
| Colorado | 2 | |
| Florida | 1 | |
| Georgia | 1 | |
| Minnesota | 2 | |
| Mississippi | 1 | |
| North Carolina | 20 | |
| Oklahoma | 6 | |
| Texas | 27 | |
Equine Influenza 20 Cases | Alberta | 2 |
| Ontario | 1 | |
| Pennsylvania | 1 | |
| Quebec | 6 | |
| Tennessee | 1 | |
| Washington | 9 | |
| Equine Viral Arteritis | Prince Edward Island | 12 |
| Lyme Disease | Ohio | 1 |
| Pigeon Fever | Washington | 1 |
Potomac Horse Fever 4 Cases | Kentucky | 1 |
| Ohio | 1 | |
| Quebec | 1 | |
| West Virginia | 1 | |
Rabies 2 Cases | Florida | 1 |
| Tennessee | 1 | |
| Rhodococcus Equi | Quebec | 1 |
Salmonellosis 5 Cases | Maryland | 1 |
| Missouri | 1 | |
| Quebec | 3 | |
Strangles 242 Cases | Alberta | 1 |
| British Columbia | 2 | |
| California | 1 | |
| Colorado | 3 | |
| Florida | 44 | |
| Indiana | 2 | |
| Kansas | 5 | |
| Kentucky | 9 | |
| Maryland | 1 | |
| Michigan | 58 | |
| Mississippi | 1 | |
| Missouri | 2 | |
| Nebraska | 2 | |
| Ohio | 1 | |
| Ontario | 35 | |
| Oregon | 2 | |
| Pennsylvania | 3 | |
| Rhode Island | 1 | |
| Tennessee | 2 | |
| Washington | 32 | |
| Wisconsin | 35 | |
West Nile Virus 244 Cases | Alberta | 2 |
| California | 33 | |
| Colorado | 39 | |
| Delaware | 6 | |
| Florida | 2 | |
| Idaho | 21 | |
| Indiana | 4 | |
| Iowa | 1 | |
| Kansas | 1 | |
| Kentucky | 15 | |
| Maine | 1 | |
| Michigan | 4 | |
| Minnesota | 5 | |
| Mississippi | 2 | |
| Missouri | 1 | |
| Nebraska | 8 | |
| New York | 5 | |
| North Dakota | 1 | |
| Ohio | 1 | |
| Oklahoma | 16 | |
| Ontario | 5 | |
| Pennsylvania | 2 | |
| Quebec | 6 | |
| South Carolina | 2 | |
| Tennessee | 4 | |
| Texas | 1 | |
| Utah | 16 | |
| Washington | 3 | |
| Wisconsin | 5 | |
| Wyoming | 32 |