Infectious Tracheobronchitis (Kennel Cough)

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Infectious Tracheobronchitis (Kennel Cough)

By: PetPlace Veterinarians

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Section: Information In-depth

Canine Infectious Tracheobronchitis (ITB), also known as the kennel cough complex, refers to a group of acute contagious infectious respiratory diseases in dogs, which can cause inflammation of the larynx, trachea, bronchi and lung. The condition is especially common in unvaccinated, young dogs.

Acute tracheobronchitis indicates an inflammatory reaction in the airways. This inflammation usually causes variable increases in tracheobronchial secretions (mucus and "sputum") and a cough.

If respiratory clearance mechanisms or immunity are insufficient, pneumonia may develop from the primary infection or from secondary bacterial invaders. Some viruses and bacteria have a predilection for the nasal cavity and membranes of the eye (the conjunctiva), leading to signs of an upper respiratory infection similar to a human cold.

Common infectious agents responsible for tracheobronchitis in the dog include: Bordetella bronchiseptica (a bacterium); canine parainfluenza virus; canine adenoviruse-2; canine reovirus (a minor cause); and canine herpesvirus (infrequent to rare cause). Bordetella bronchiseptica is the most common bacterial and canine parainfluenza virus is the most common viral isolate noted in dogs with canine infectious tracheobronchitis (ITB).

Canine distemper virus can mimic these signs and lead to widespread organ disease.

In addition to infectious (contagious) causes of tracheobronchitis, other conditions of the upper and lower airways may cause signs similar to those of infectious tracheobronchial infection. Your veterinarian may need to perform tests to rule out some of these other conditions. This is particularly true if initial treatment of the condition does not lead to an appropriate response. The list of potential causes of these symptoms is very long. They include:

Pharyngitis (tonsillitis)

Oral infections with seeding of the tracheobronchial tree

Laryngeal swelling

Intestinal parasites (worms)undergoing lung migration

Fungal infections of the lung

Pneumonia

Aspiration pneumonia

Respiratory tract parasites

Tracheal collapse

Allergic bronchitis or chronic bronchitis

Foreign body inhalation (something really is stuck in the throat)

Heart disease

Lung or windpipe tumor or cancer

Trauma to the trachea (windpipe)

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1Chronic Coughing in Dogs
Coughing, a common protective reflex that clears secretions or foreign matter from the throat, voice box, windpipe or airways, and protects the lungs from aspiration, affects the respiratory system by...
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Infectious Tracheobronchitis (Kennel Cough)

Infectious Tracheobronchitis (Kennel Cough)

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