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Do Cats With Breathing Problems Suffer Asthma?
J.A. Montoya-Alonso
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Feline asthma is one of the most common respiratory diseases of cats. It consists in a chronic inflammatory disease of the upper airways (bronchi and bronchioles) often of unknown cause. Usually, it affects young and middle-aged patients. Some predisposition has been found in Siamese cats. The typical clinical signs include cough, sneezes, intolerance to exercise and acute respiratory distress.
The respiratory tract has some simple mechanisms of defense that protect lungs from external harmful agents. An irritant or inflammatory stimulus to the respiratory epithelium causes:
- Bronchial epithelium inflammation and edema.
- Hypertrophy and hyperactivity of the gland mucose with higher mucus secretion.
- Contraction of the bronchial smooth muscle.
These changes result in reduction of the respiratory tract diameter, the consequent increased resistance to airflow through the airways, and higher inflammation, which will cause clinical signs.
Severe obstruction of airways creates a pulmonary hyperinsuflation state because it is difficult to exhale the air completely. Sometimes, a potential consequence is permanent dilation of the airways (bronchiectasis) and decreased lung elasticity (emphysema). […]
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About
Affiliation of the authors at the time of publication
Facultad de Veterinaria de Las Palmas de Gran Canaria. 35416- Arucas (Las Palmas)- ESPAÑA
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