It affects calves from a few weeks to one year of age.
The etiological agent is generally Fusobacterium necrophorum or Trueperella pyogenes.
Symptoms: it generally causes severe dyspnea, respiratory stridor, coughing, difficulty swallowing, and in the most severe cases, cyanosis.
Treatment is based on systemic antibiotic therapy and NSAIDs, and almost always tracheostomy.
The prognosis is always guarded.
