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Necrotic Laryngitis (Calf Diphtheria)
RespiratoryBovineNew
Key Points
  • Necrotic laryngitis (calf diphtheria) is a necrotising, ulcerative infection of the laryngeal mucosa
    • Can extend into the submucosa and laryngeal cartilages
  • The primary pathogen is Fusobacterium necrophorum but secondary invaders may contribute to infection
  • Most common in young calves, particularly under high-stress conditions or following mucosal damage
  • Clinical signs include a moist cough, halitosis, stridor, dysphagia and dyspnoea
  • Diagnosis is based on the clinical presentation and visualisation of the larynx with endoscopy
  • Broad-spectrum antibiotics, anti-inflammatories and supportive care are key for treatment
  • Prevention focuses on minimising trauma and stress
Differential Diagnoses
  1. Infectious bovine rhinotracheitis (IBR)
  2. Foreign body obstruction
  3. Tracheal oedema syndrome
Overview
Aetiology
Clinical Signs
Diagnosis
Treatment
Prevention
Resources
Overview

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Aetiology

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Clinical Signs

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Diagnosis

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Treatment

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Prevention

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Resources

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Educational content only. This factsheet is for general veterinary education and is not a substitute for professional veterinary advice, diagnosis, or treatment. Not for use in an emergency — contact a veterinarian or emergency service. Full disclaimer →