Figure 4.

Radiographic and computed tomography images of the thorax of a calf from group 3 (chronic-long term respiratory disease) with a respiratory score of 7 and body temperature of 38.1 C. No bacteria or Mycoplasma bovis were isolated. (A) Lateral radiograph of the thorax demonstrating minimal lung parenchymal changes of the most ventral and cranial aspects of the lungs. Most aspects of the lung are normally air filled. Transverse CT image of the cranial (B,C) caudal aspect of the lungs illustrating that only minimal alveolar changes are noted in the cranioventral aspects of the lungs, and no pathology was noted caudoventral and -dorsal.