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*Rarely causes primary disease
*Rarely causes primary disease
*Exception: immune-compromised Arab foals (showing both B/T cell deficiencies), causing necrotising [[Respiratory Viral Infections - Pathology#Equine adenovirus|bronchiolitis]][[Category:Adenoviridae]][[Category:Horse]]
*Exception: immune-compromised Arab foals (showing both B/T cell deficiencies), causing necrotising [[Respiratory Viral Infections - Pathology#Equine adenovirus|bronchiolitis]]
[[Image:Adenovirus in equine lung.jpg|right|thumb|100px|<small><center>Adenovirus in equine lung (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
*[[Adenoviridae|Adenoviridae]]
*May cause necrotising [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchiolitis]] in immune-deficient foals (Arabian foals)
*Grossly:
**[[Lungs Ventilation - Pathology#Atelectasis (Collapse)|Atelectasis]] and consolidation of lobules in cranioventral region
**Mucopurulent exudate in airways
*Histologically:
**Severe bronchiolitis, necrotising -> proliferative
**Bronchiolar obstruction by sloughed debri and [[Neutrophils|neutrophils]] -> alveolar atelectasis
*May lead to secondary bacterial infections
[[Category:Adenoviridae]][[Category:Horse]]
[[Category:To_Do_-_Viruses]]
[[Category:To_Do_-_Viruses]]