- Horses live, eat, and work in a dust - laden environment.
- Some horses work in urban areas, which are polluted.
- Dust and air pollutants contribute to SAID.
- Dust is composed of molds, bacteria
and their toxins, minerals, insect parts,
and various chemicals all stuff things that cant be seen
with the naked eye.
- Air pollutants are mostly gases, like ozone,
sulfur dioxide, and nitrous oxide, but particulate
matter, such as heavy metals, carbon, and smoke,
contribute to pollution exposure in urban horses.
- Air within the stable can be polluted with ammonia,
bacterial byproducts (e.g. endotoxin), molds and other chemicals which irritate the
How Allergens Cause SAID
- The horses lung is huge it samples thousands of gallons of
air in just a few minutes of intense exercise.
- Dust particles enter airways and are trapped on their inner surface.
- Dust, gases, and chemicals severely irritate the sensitive airway lining.
- The airways, which are active living issue, mount a rapid and aggressive
defense called inflammation.
- The extent of this reaction appears to depend on the susceptibility of
- Some horses mount a stronger, more prolonged defense reaction, which can
cause more harm than good.
- It has been speculated that viral infections can precipitate SAID.
- Airway inflammation results. Mucus and cellular debris accumulate within
the airways; the airway walls thicken, constrict or collapse.