What diseases of horses are reportable?

According to the USDA’s National Animal Health Reporting System (www.aphis.usda.gov/vs/nahss/disease_status.htm#equine) the following horse diseases are reportable to state and/or federal animal health authorities. Individual states may require additional diseases to be reported and additional diseases may be added to this list at any time.
Vesicular Stomatitis (VS)
African horse sickness
Anthrax (Bacillus anthracis)
Echinococcosis / hydatidosis
New World screwworm (Chrysomyia hominivorax)
Old World screwworm (Chrysomyia bezziana)
Trichinellosis (Trichinela spiralis)
Contagious equine metritis (Taylorella equigenitalis)
Dourine (Trypanosoma equiperadum)
Equine infectious anemia (EIA)
Equine influenza (Virus Type A)
Equine piroplasmosis (Babesiosis, Babesia [Piroplasma] equi, B. caballi)
Equine rhinopneumonitis (EHV 1 and 4)
Equine herpesvirus myeloencephalopathy (EHV1 – EHM)
Glanders (Pseudomonas mallei)
Equine viral arteritis (EVA)
Japanese encephalitis
Surra (Trypanosoma evansi)
Venezuelan equine encephalomyelitis
Tularemia (Francisella tularensis)
West Nile fever
Equine encephalomyelitis (Eastern)
Equine encephalomyelitis (Western)
For additional information on reportable animal diseases search for FAQ’s and articles by animal group (swine, horses, poultry, cattle, sheep and goats) or the specific disease.