Difference between revisions of "Canine Infectious Tracheobronchitis"
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Also known as: '''''Kennel Cough — Canine Respiratory Disease Complex — Infectious Canine Tracheobronchitis — Infectious Canine Tracheitis''''' | Also known as: '''''Kennel Cough — Canine Respiratory Disease Complex — Infectious Canine Tracheobronchitis — Infectious Canine Tracheitis''''' | ||
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A highly contagious acute respiratory disease spread by close contact causing laryngitis, tracheitis, bronchitis and in some cases a rhinitis. | A highly contagious acute respiratory disease spread by close contact causing laryngitis, tracheitis, bronchitis and in some cases a rhinitis. | ||
− | Multiple agents are implicated in the disease including [[Canine Adenovirus 1|Canine Adenovirus 1]],[[Canine Adenovirus 2|Canine Adenovirus 2]],[[Canine Herpesvirus 1|Canine Herpes virus]], [[Canine Parainfluenza - 2|Canine Parainfluenza - 2]], [[Canine Distemper Virus|Canine Distemper Virus]], [[:Category:Mycoplasmas|Mycoplasma species]] and [[Bordetella bronchiseptica|''Bordetella bronchoseptica'']]. Most cases involve a primary viral infection and sometimes with secondary bacterial involvement. ''B.bronchoseptica'' adheres to ciliated epithelial cells in the trachea where it proliferates and releases toxins causing epithelial necrosis and prevents[[Diseases of the nasal cavity and sinuses#Mucociliary escalator| ciliary clearance]]. Mortality rates are very low and it is a common disease in dogs that are housed in groups. | + | Multiple agents are implicated in the disease including [[Canine Adenovirus 1|Canine Adenovirus 1]], [[Canine Adenovirus 2|Canine Adenovirus 2]], [[Canine Herpesvirus 1|Canine Herpes virus]], [[Canine Parainfluenza - 2|Canine Parainfluenza - 2]], [[Canine Distemper Virus|Canine Distemper Virus]], [[:Category:Mycoplasmas|Mycoplasma species]] and [[Bordetella bronchiseptica|''Bordetella bronchoseptica'']]. Most cases involve a primary viral infection and sometimes with secondary bacterial involvement. ''B.bronchoseptica'' adheres to ciliated epithelial cells in the trachea where it proliferates and releases toxins causing epithelial necrosis and prevents[[Diseases of the nasal cavity and sinuses#Mucociliary escalator| ciliary clearance]]. Mortality rates are very low and it is a common disease in dogs that are housed in groups. |
==Signalment== | ==Signalment== | ||
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The clinical signs typically persist from 2-3 days to 2-3 weeks. | The clinical signs typically persist from 2-3 days to 2-3 weeks. | ||
− | Systemic signs are likely to indicate the development of [[ | + | Systemic signs are likely to indicate the development of [[Bronchopneumonia|bronchopneumonia]], signs include pyrexia, inappetance and depression. Systemic disease is more likely to occur in young or immunocompromised animals. This condition is usually a result of secondary infection with [[:Category:Pasteurella and Mannheimia species| ''Pasturella'' species]] and [[:Category:Streptococcus species|''Streptococci'' bacteria]]. If widespread systemic signs are present infection with canine distemper virus should be suspected. |
Diagnosis is most often made on history and physical exam ruling out other causes of the cough. | Diagnosis is most often made on history and physical exam ruling out other causes of the cough. | ||
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==Treatment== | ==Treatment== | ||
Uncomplicated cases are often self limiting and will resolve with a regime of strict rest for 7 days until coughing subsides. | Uncomplicated cases are often self limiting and will resolve with a regime of strict rest for 7 days until coughing subsides. | ||
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− | Antitussives | + | Antibiotic treatment is indicated if the animal is showing signs of systemic illness, fever, mucoid or mucopurulent nasal discharge, or if there is bronchopneumonia present. Where culture and sensitivity has been undertaken an appropriate antibiotic should be chosen on these results otherwise [[Tetracyclines| doxycycline]], [[Macrolides and Lincosamides|erythromycin]], [[Chloramphenicol|chloramphenicol]] or a [[Potentiated-Sulphonamides| potentiated sulphonamide]] are good choices. |
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+ | Antitussives (Hydrocodone, Codeine....without acetaminophen) may be used to alleviate severe coughing. Do not use cough suppressants in patients with pulmonary infiltrates, rather encourage coughing and use expectorant such as bromhexine along with nebulization and coupage. Nebulization with saline, bronchodilators, and/or antibiotics can also be useful to help loosen bronchial and tracheal secretions. | ||
In patients with severe disease further supportive care including [[Principles of Fluid Therapy |fluids]] and enteral feeding will be required. | In patients with severe disease further supportive care including [[Principles of Fluid Therapy |fluids]] and enteral feeding will be required. | ||
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+ | Prednisone at an anti-inflammatory dose (0.5mg/kg BID, tapering) can be used to decrease tracheal inflammation and stop the cough-inflammation-infection cycle. Be careful to not use in animals that are ill or showing signs of pneumonia or systemic illness. | ||
==Control== | ==Control== | ||
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Good, generally self limiting. | Good, generally self limiting. | ||
− | = | + | {{Learning |
− | + | |flashcards = [[Trachea_Flashcards_-_Pathology|Trachea Pathology Flashcards]] | |
− | [[Trachea_Flashcards_-_Pathology|Trachea Pathology Flashcards]] | + | |literature search =[http://www.cabdirect.org/search.html?q=title%3A%28%22Canine+Infectious+Tracheobronchitis%22%29+OR+title%3A%28%22Kennel+Cough%22+%29+OR+title%3A%28%22Canine+respiratory+disease+complex%22+%29+OR+title%3A%28%22Infectious+Canine+Tracheobronchitis%22%29+OR+title%3A%28%22Infectious+Canine+tracheitis%22%29+ Canine Infectious Tracheobronchitis] |
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− | [http://www.cabdirect.org/search.html?q=title%3A%28%22Canine+Infectious+Tracheobronchitis%22%29+OR+title%3A%28%22Kennel+Cough%22+%29+OR+title%3A%28%22Canine+respiratory+disease+complex%22+%29+OR+title%3A%28%22Infectious+Canine+Tracheobronchitis%22%29+OR+title%3A%28%22Infectious+Canine+tracheitis%22%29+ Canine Infectious Tracheobronchitis] | ||
==References== | ==References== | ||
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− | [[Category:Dog]] | + | [[Category:Respiratory Diseases - Dog]] |
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[[Category:Respiratory_Viral_Infections]] | [[Category:Respiratory_Viral_Infections]] | ||
[[Category:Respiratory_Bacterial_Infections]] | [[Category:Respiratory_Bacterial_Infections]] | ||
[[Category:Expert_Review]] | [[Category:Expert_Review]] |
Latest revision as of 17:02, 28 June 2016
Also known as: Kennel Cough — Canine Respiratory Disease Complex — Infectious Canine Tracheobronchitis — Infectious Canine Tracheitis
Description
A highly contagious acute respiratory disease spread by close contact causing laryngitis, tracheitis, bronchitis and in some cases a rhinitis.
Multiple agents are implicated in the disease including Canine Adenovirus 1, Canine Adenovirus 2, Canine Herpes virus, Canine Parainfluenza - 2, Canine Distemper Virus, Mycoplasma species and Bordetella bronchoseptica. Most cases involve a primary viral infection and sometimes with secondary bacterial involvement. B.bronchoseptica adheres to ciliated epithelial cells in the trachea where it proliferates and releases toxins causing epithelial necrosis and prevents ciliary clearance. Mortality rates are very low and it is a common disease in dogs that are housed in groups.
Signalment
Affects dogs of all ages. Puppies and immunocompromised dogs are often worst affected.
Diagnosis
History and Clinical Signs
Often a history of exposure to other dogs at either rehoming centers, bording kennels, or in a hospital etc. Direct contact or aerosol spread are the most common routes of infection. Clinical signs develop 3-5 days after exposure. Signs are often mild and self limiting. Affected dogs usually have a dry hacking cough which is likely to be exacerbated on exercise or excitement. Sometimes sneezing, serous nasal discharge and lymphadenopathy are present. The clinical signs typically persist from 2-3 days to 2-3 weeks.
Systemic signs are likely to indicate the development of bronchopneumonia, signs include pyrexia, inappetance and depression. Systemic disease is more likely to occur in young or immunocompromised animals. This condition is usually a result of secondary infection with Pasturella species and Streptococci bacteria. If widespread systemic signs are present infection with canine distemper virus should be suspected.
Diagnosis is most often made on history and physical exam ruling out other causes of the cough.
Laboratory Tests
Haematology and Biochemistry will help to look for an underlying cause of disease in immunocomprommised animals. Additionally they may show signs of infection including a Neutrophilia sometimes with a left shift.
Radiography
Thoracic radiography and ultrasound are often unremarkable however may help to rule out other causes of the cough.
Endoscopy
Only considered when it is necessary to rule out a number of alternative diagnoses. Will enable collection of samples from the respiratory tract. Often no specific findings however, tracheal cytology may reveal increased numbers of neutrophils and bacteria. Samples for bacteriology from the upper airways may be deceptive as they are likely to harbour commensal organisms. Ideally samples should be collected from the lower airways by a transbronchial wash.
Treatment
Uncomplicated cases are often self limiting and will resolve with a regime of strict rest for 7 days until coughing subsides.
Antibiotic treatment is indicated if the animal is showing signs of systemic illness, fever, mucoid or mucopurulent nasal discharge, or if there is bronchopneumonia present. Where culture and sensitivity has been undertaken an appropriate antibiotic should be chosen on these results otherwise doxycycline, erythromycin, chloramphenicol or a potentiated sulphonamide are good choices.
Antitussives (Hydrocodone, Codeine....without acetaminophen) may be used to alleviate severe coughing. Do not use cough suppressants in patients with pulmonary infiltrates, rather encourage coughing and use expectorant such as bromhexine along with nebulization and coupage. Nebulization with saline, bronchodilators, and/or antibiotics can also be useful to help loosen bronchial and tracheal secretions.
In patients with severe disease further supportive care including fluids and enteral feeding will be required.
Prednisone at an anti-inflammatory dose (0.5mg/kg BID, tapering) can be used to decrease tracheal inflammation and stop the cough-inflammation-infection cycle. Be careful to not use in animals that are ill or showing signs of pneumonia or systemic illness.
Control
Vaccines can prevent or reduce the severity of disease caused by B. bronchiseptica, parainfluenza virus and adenovirus. Vaccinated animals can still contract the disease as multiple agents are implicated. Vaccines are available to be given systemically or intranasally. Intranasal vaccination provides mucosal IgA immunity and the presence of maternal antibodies do not affect actions of the vaccine.. It is important to practice good husbandry in areas where groups of dogs mix e.g boarding kennels . Ideally all animals should be vaccinated, any infected animals should be isolated to minimise the spread to unaffected animals and all fomites that have come into contact with an affected animal must be disinfected. Areas should be kept well ventilated and ideally animals should be kept in low population densities.
Prognosis
Good, generally self limiting.
Canine Infectious Tracheobronchitis Learning Resources | |
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Flashcards Test your knowledge using flashcard type questions |
Trachea Pathology Flashcards |
Literature Search Search for recent publications via CAB Abstract (CABI log in required) |
Canine Infectious Tracheobronchitis |
References
Ettinger, S.J, Feldman, E.C. (2005) Textbook of Veterinary Internal Medicine (6th edition, volume 2) W.B. Saunders Company
Merck & Co (2008) The Merck Veterinary Manual (Eighth Edition) Merial
This article has been peer reviewed but is awaiting expert review. If you would like to help with this, please see more information about expert reviewing. |
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