Species

Horse, dog, cat

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Age group

Horse: mainly foals affected. In dogs and cats are the infection most often seen together with viral diseases.

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Histological image

Sharp demarcation between aerated and non-aerated lung areas is seen. There is exudate (proteinrich fluid mixed with neutrophils and macrophages) in the lumina of bronchi, bronchioles and alveoli. Tall columnar bronchial epithelium, increased number of cell nuclei (bronchial epithelial hyperplasia) and peribronchiolar infiltration of round cells (narrow cuff of neutrophils and macrophages) are also seen.
Bordetellosis
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Histologic diagnosis

Bronchopneumonia, catarrhal-suppurative, multifocal, moderate, moderate
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Aetiology

Bordetella bronchiseptica: gram-negative, coccoid to oval, pleomorphic, strictly aerobic rods.
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Disease

Mittelgradige subakute katarrhalisch-eitrige Bronchopneumonie
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Pathogenesis

Bordetella bronchiseptica is an obligate commensal organism found in the upper respiratory tract of rodents, dogs and pigs. It is one of the causative agents of kennel cough in dogs. Bordetella bronchiseptica often causes secondary bacterial infection in cases with interstitial pneumonia, e.g. morbillivirus infection (distemper). Bordetella bronchiseptica can be the cause of secondary purulent bronchopneumonia in foals and cats (can also cause primary bronchopneumonia). In pigs, this agent is involved in atrophic rhinitis and bordetellosis of suckling pigs (also see Bordetellosis of suckling pigs). 
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Differential diagnoses

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Further investigations

Bacteriology: identification of agent

Histology 

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