Laryngeal Contact Ulcers in Feedlot Cattle
| Autor: | C. E. Rehfeld, D. E. Flack, D. P. Horton, L. H. Lauerman, M. F. Cox, N. Einertson, P. M. Braddy, R. Jensen, G. K. Miller |
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| Rok vydání: | 1980 |
| Předmět: |
0301 basic medicine
Larynx medicine.medical_specialty 040301 veterinary sciences Cattle Diseases Scars Laryngeal Diseases 0403 veterinary science 03 medical and health sciences Swallowing otorhinolaryngologic diseases medicine Animals Pasteurella Ulcer Nose Contact ulcers General Veterinary biology business.industry Pharynx 04 agricultural and veterinary sciences Anatomy respiratory system biology.organism_classification Surgery 030104 developmental biology medicine.anatomical_structure Reflex Cattle medicine.symptom business |
| Zdroj: | Veterinary Pathology. 17:667-671 |
| ISSN: | 1544-2217 0300-9858 |
| DOI: | 10.1177/030098588001700602 |
| Popis: | Of 30,444 larynges from fattened cattle at three companies, 3,985 (13.1%) had contact ulcers or ulcer scars in the mucous membranes over the vocal processes and medial angles of the arytenoid cartilages. The incidence was higher in cattle fed during fall than in cattle fed during other seasons. We hypothesize: 1. that some feedlot cattle develop acute mucositis from mixed infections with species of Pasteurella, Haemophilus, Mycoplasma, and viruses in the nose, pharynx, and larynx; 2. that reflex coughing and swallowing accelerate the rate of larynx closure; and 3. that the closures erode the swollen membrane over the vocal processes and medial angles of the arytenoid cartilages and thus produce primary contact ulcers. |
| Databáze: | OpenAIRE |
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