The larynx is the part of the throat often called the “voice box” in humans. Laryngitis is an inflammation of the larynx. It may result from upper respiratory tract infection or by direct irritation from inhalation of dust, smoke, irritating gas, or foreign objects. It can also be caused by trauma, excessive meowing, or a tumor of the larynx. Laryngitis may accompany infectious rhinotracheitis and calicivirus infection in cats. Fluid
Feline respiratory disease complex is a set of respiratory illnesses caused by a group of organisms that can cause infection alone or together. It includes those illnesses with signs including inflammation of the nasal and sinus linings, inflammation of the eye lining (conjunctivitis), excessive tear production, salivation, and mouth sores. The principal diseases are feline viral rhinotracheitis (also called feline her
Emphysema is an important disease in humans; however, in other animals it typically occurs as a result of another lung disease. The condition leads to difficulty in expelling air from the lungs, making breathing more difficult. Two major forms of emphysema are generally recognized. Alveolar emphysema is abnormal permanent enlargement and destruction of the alveoli, which are small air sacs deep in the lungs. Interstiti
The diaphragm is a layer of muscle that extends across the base of the chest and separates the chest from the abdomen. Contraction of the diaphragm causes the lungs to expand and inhale air during breathing. Adiaphragmatic hernia is a condition in which a break in the diaphragm allows protrusion of abdominal organs into the chest. In cats, automobile-related trauma is a common cause of diaphragmatic hernia, although defects of the diaphragm
The respiratory system can be a host to many different types of tumors and cancers. The following are the more common tumors found in the lungs and airways of cats.
Tumors of the Nose and Sinuses
Tumors of the nose and sinuses are relatively uncommon in cats as compared to dogs. The incidence is higher in male cats. The average age at time of diagnosis is 12 years. In cats, more
Allergic pneumonitis is an acute or chronic allergic reaction of the lungs and small airways. The lungs “overreact” to the presence of a parasite or other irritant, causing inflammation and a chronic cough. There is often a higher than normal number of white blood cells, especially those called eosinophils, in the blood. The underlying cause is rarely determined.
Eosinophilic bronchopneumopathy, previously known as pulmonary infiltra
The pleural cavity is the space within the chest that surrounds the lungs. Disorders in this area impact the lungs from the outside, often making it difficult for a cat to inhale air.
Hemothorax, the accumulation of blood in the pleural cavity, is usually caused by trauma to the chest, blood clotting disorders, or tumors in the chest. Hydrothorax, the accumulation of clear f
The respiratory system consists of the large and small airways and the lungs. When a cat breathes air in through its nose or mouth, the air travels down the trachea, which divides into the tubes known as the right and left bronchi, then into the smaller airways called bronchioles in the lungs. The bronchioles end in the small sacs called