2015 ACVIM Forum Research Abstract Program

The results of this meta-analysis might suggest a pathogenic role of Mycoplasma in feline URT, with possible asymptomatic carriage after initial infection. Case and control populations should be carefully selected in future studies. More evidence is required to determine whether Mycoplasma is truly pathogenic in feline LRT. IN 11 SHIH TZU DOGS: (2007 -2014 . Amy Brida, Elizabeth Rozanski, Kristen Antoon, John Rush. Tufts University, North Grafton, MA, USA Pulmonary hypertension (PHTN), defined as an increased in pulmonary arterial pressure >25 mmHg at rest may develop due to a variety of causes in dogs and is often classified into one of five mechanisms using the WHO classification scheme. When PHTN is due to left heart disease it is termed post-capillary and is WHO classification II. Pre-capillary causes of PHTN include WHO classification Types I, III, IV and V and may result from many causes including heartworm disease, COPD, and pulmonary vascular diseases. Pulmonary hypertension of all causes has been associated with a guarded prognosis in dogs. In our practice, pre-capillary PHTN, typically without heartworm disease and without thrombotic disease, is a common cause of respiratory signs in Shih Tzu dogs. The purpose of this study is to describe the clinical attributes of a series of Shih Tzu dogs with severe pre-capillary PHTN.