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==Description==
 
==Description==
Summer Pasture-Associated Recurrent Airway Obstruction(SPA-RAO) is an inflammatory condition of the lower airways affecting pasture-kept horses. This is in contrast to Recurrent Airway Obstruction that affects horses that are stabled. The disease is characterised by airway inflammation, increased airway mucus production, reduced mucociliary clearance and bronchoconstriction. It occurs most commonly in the South of the United States but has also been reported in the United Kingdom.
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Summer Pasture-Associated Recurrent Airway Obstruction (SPA-RAO) is an inflammatory condition of the lower airways affecting pasture-kept horses. This is in contrast to Recurrent Airway Obstruction that affects horses that are stabled. The disease is characterised by airway inflammation, increased airway mucus production, reduced mucociliary clearance and bronchoconstriction. It occurs most commonly in the South of the United States but has also been reported in the United Kingdom.
    
==Signalment==
 
==Signalment==
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