Equine respiratory ddx

Question 1

Inflammatory airway disease ( IAD)

Answer 1

• chronic inflammatory disease a part of the equine asthma syndrome
• ** younger horse, present with exercise intolerance, and cough **
• ** DOES NOT have increased RR at rest **
  ( not like RAO )
• BAL fluid –> can be an increase in almost any inflammatory cell
  ( RAO - primarily neutrophilia)

Question 2

Recurrent airway obstruction (RAO)

“heaves”

Answer 2

• chronic inflammatory disease a part of the equine asthma syndrome
• ** older horse, present with increased RR/RE, cough, and nasal discharge **
• more severe CS such as heave line, auscultable crackles and wheezing, flared nostrils at rest
• ** INCREASED RR AT REST ** ( unlike IAD)
• BAL fluid - significant neutrophilia ( rather than general increased inflammatory cells like with IAD )