Quote:
Originally Posted by Riot
Yes, small airway disease such as chronic inflammation, allergy does exacerbate EIPH. Yes, environmental contaminants (air pollution, ammonia in air from stall, chronic dust in air from straw/hay) can cause small airway disease.
Dirt in the airways from inhalation racing doesn't get down to the bronchioles, let alone alveoli. It stays in the first 4 generations of lung branching (in the trachea and major bronchi) and is readily moved up and out by cilliary action in most cases. Not a big contributor to airway inflammation. Just like dirt inhaled into your nose when you dirt bike or run in a dusty place is snotted out readily, and doesn't give you an asthma attack. Dust in the air doesn't get down there, either. A particle has to be particular micron size to make it down there. Nature's design is good.
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So horses at racing speed, where ventilation is dramatically increased, are not possibly inhaling bacteria, viruses, or other organic or inorganic matter of the requisite size while taking in clods of dirt in a cloud of kickback?
05-14-2012, 06:45 PM
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