Fig. 15

Radiographs of a cat from Group C: Day 110. Left lateral and ventrodorsal radiographs of a cat from Group C (infected no treatment, with two heartworms at necropsy) that was heartworm antibody and antigen positive. Day 0 radiographs were normal, and did not differ from Group A cats on Days 0–240, and Group B on Day 0. The lungs revealed an interstitial and bronchial pattern on Day 110, more marked in the caudal lung lobes, which became more severe on Day 175 with anterior lobes becoming more involved. The pulmonary arteries could not be clearly defined because of the severity of the lung parenchymal disease. On Day 240, the lung disease continued to be evident and the left caudal pulmonary artery was slightly more pronounced beyond the cardiac silhouette. The heart and main pulmonary artery was not enlarged