Day, Jane, and Schull, Daniel (2008) Findings from thoracic radiographs of dogs and cats with tick toxicity. Australian Veterinary Practitioner, 38 (3). pp. 86-91.

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Abstract

Lateral thoracic radiographs of 75 dogs and 16 cats with tick toxicity, sequentially presented to a veterinary hospital, were examined for evidence of megaoesophagus and lung changes, specifically for evidence of aspiration pneumonia, pulmonary oedema, a bronchial pattern and dilation of the right cranial lobar pulmonary vein. In dogs, the two most frequent changes were pulmonary vein dilation (38%) and a bronchial pattern (25%), followed by megaoesophagus (17%), aspiration pneumonia (7%) and pulmonary oedema (1 %). Sixty-four percent of dogs had at least one of these findings, and 18% had at least two findings. The mean pulmonary artery to pulmonary vein ratio of all dogs measured was 0.97 (normal=1). In those with dilation of the pulmonary vein the ratio was 0.7. These findings indicated that many (38%) dogs had early signs of pulmonary congestion. The thoracic radiographs from this group of cats were unremarkable, except for one cat with pulmonary vein dilation.

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