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==In Cattle==
 
==In Cattle==
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===Necrotic laryngitis===
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===[[Necrotic Laryngitis]]===
[[Image:Necrotising laryngitis.jpg|right|thumb|100px|<small><center>Necrotising laryngitis (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
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[[Image:Tracheitis in calf diphtheria.jpg|right|thumb|100px|<small><center>Tracheitis in calf diphtheria (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
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*Synonyms: '''laryngeal diphtheria, calf diphtheria'''
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*Common disease in cattle, and can occur in swine
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*Caused by infection with [[Fusobacterium|''Fusobacterium necrophorum'']] 
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*Lesions may also be found in other parts of the [[Nasopharynx Inflammatory - Pathology#Infectious causes of pharyngitis|oropharynx]] 
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*The bacterium usually gains entry through damaged mucosal surfaces e.g. after viral infections or injury following (poor!) use of dosing guns, coarse poor quality roughage
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*Results in severe acute neutrophilic [[Larynx Inflammatory - Pathology#Infectious causes of laryngitis|laryngitis]]
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*Extensive accumulation of fibrin and necrotic cellular debris on the ulcerated mucosal surface
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*Lesions appear as dry plaques of fibrinonecrotic exudate and ulceration on the laryngeal mucosa
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*Inhalation of exudate and bacterial organisms may cause [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|broncho]][[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|pneumonia]]
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*Death may result from toxaemia or asphyxiation
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*Also may occur in pigs
      
===''CAR bacillus''===
 
===''CAR bacillus''===
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