Читать книгу Canine and Feline Respiratory Medicine - Lynelle Johnson R., Lynelle R. Johnson - Страница 17

Stertor is commonly encountered in brachycephalic dog breeds such as bulldogs (English and French), Pugs, and Boston Terriers, and is also seen in Himalayan and Persian cats. Loud breathing is often present early in life and becomes worse with the development of additional respiratory disease or with weight gain. Some animals are not presented for evaluation of stertor and respiratory difficulty until late in life because of the perception that noisy respiration is “normal” for the breed.

Animals with stridor due to congenital laryngeal paralysis are usually young (6–12 weeks) when the clinical signs are first apparent, although some breeds show signs at 4–6 months and others at 1–2 years of age. Affected breeds include the Dalmatian, Rottweiler, Great Pyrenees, Bouvier des Flandres, Siberian Husky, White German Shepherd, and some cats (see Chapter 5). Acquired laryngeal paralysis is most commonly found in older large breed dogs such as Labrador and Golden Retrievers as part of a generalized polyneuropathy. Brachycephalic breed dogs that develop laryngeal collapse are usually older at the time of diagnosis; however, because this is an end‐stage manifestation of airway obstruction, the age at which the condition is recognized varies depending on the severity of the obstruction.