Ticks are small parasitic arachnids and carry a number of different diseases that can transmit to mammalian hosts. The outdoor lifestyle of horses makes them susceptible to tick infestation,
Tick paralysis results when a tick’s saliva delivers a paralytic toxin into the bloodstream of its host. Equine tick paralysis is rare, as horses seem to be resistant to most tick toxins.
Tooth root abscesses are infections occurring at the base of the tooth, known as the root in horses. Infections in this area often affect the surrounding bone, ligaments, and in the case of upper teeth, the sinuses can become infected.
Tetanus is an uncommon, life-threatening disease in horses caused by a toxin produced by the bacterium Clostridium tetani. Tetanus causes contraction of muscles, resulting in symptoms such as mild colic, a stiff/spastic gait, lameness, rigid body and limbs, and contraction of muscles in the face.
Theiler’s disease is a form of liver disease affecting adult horses. Also known as equine serum hepatitis, it is a rare but potentially life-threatening condition.
Thyroid tumors arise from the cells of the thyroid gland, and are typically benign in horses.
Tyzzer’s disease in horses is a severe form of hepatitis, caused by the bacteria Clostridium piliforme. This bacterium mainly targets the liver in horses and in rare cases the intestines and heart.