1. Lower airway diseases of the adult horse
Pamela A Wilkins, DVM, MS, PhD 
Veterinary Clinics: Equine Practice 
Volume 19, Issue 1, Pages (April 2003)
DOI: /S (02)00069-X

2. Fig. 1
Thoracic radiograph of pleuropneumonia secondary to mineral oil aspiration. Radiograph was taken of the dorsal midthorax. Note the diffuse alveolar pattern overlying the prominent bronchointerstitial pattern.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

3. Fig. 2
Thoracic radiograph of a horse with acute respiratory distress syndrome. Note that the caudal cardiac silhouette is obscured by the alveolar and bronchointerstitial pattern. Air bronchograms are visible in the caudal ventral lung region. Radiograph is of the dorsal midthoracic region.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

4. Fig. 3
Thoracic radiograph of a horse with pneumothorax/hemothorax secondary to trauma. Note the pleural line dorsally and increased density ventrally representing blood accumulation in the pleural space.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

5. Fig. 4
Electron micrograph of normal blood gas barrier in the equine lung.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

6. Fig. 5
Electron micrograph illustrating pulmonary edema secondary to negative pressure pulmonary edema.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

7. Fig. 6
Thoracic radiograph of the caudal dorsal lung of a horse with interstitial pneumonia. Note the diffuse patchy alveolar pattern overlying the diffuse interstitial pattern.
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)

8. Fig. 7
Histopathology of interstitial pneumonia. Note the severe interstitial fibrosis. (Courtesy of Fabio Del Piero, DVM, Kennett Square, PA.)
Veterinary Clinics: Equine Practice  , DOI: ( /S (02)00069-X)