*An unclassified bacteria that can't be grown in culture
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*Colonises ciliated epithelium in '''rodents''' and ruminants
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*Associated with [[Nasal Cavity Inflammatory - Pathology#Infectious causes of rhinitis|chronic lymphocytic rhinitis]], [[Trachea Inflammatory - Pathology#Infectious causes of tracheitis|tracheitis]] and [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchitis]]
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*Clinical disease in '''rabbits''' and '''rodents'''