Laryngeal Diphtheria and Papillomatosis in Feedlot Cattle

Abstract

Abstract. In a random sample of 30,444 larynges from slaughtered beef cattle, 441 (1.4%) had chronic diphtheria and 1,345 (4.4%) had papillomatosis. Both types of lesions were centered in mucous membranes over the vocal processes and medial angles of the arytenoid cartilages. Since they are found in the same anatomical locations as laryngeal contact ulcers, we hypothesize that ulcers are primary and diphtheria and papillomatosis are secondary.

Tracheal Stenosis in Feedlot Cattle

“…3 Squamous cell carcinoma and transitional cell carcinoma have been most frequently identified in the literature. 2,4,7 This report describes a malignant primary urinary bladder tumor in a filly.…”

“…Organisms (number of cases) found were Escherichia coli (9 cases), Clostridiumperfringens (5), Actinomycespyogenes (4), Pasteurella multocida (4), C. novyi (3), Streptococcus dysgalactiae (S. equisimilis subsp. dysgalactiae) (3), and P. haemolytica (2).…”

Diphtheroid Necrotic Laryngitis in Three Calves – Diagnostic Procedure, Therapy and Post‐operative Development

“…Most laryngeal diseases in calves are caused by necrotic and diphtheroid inflammation of the mucosa. Laryngitis results from an interaction of mechanical mucosal lesions with following bacterial infection by Fusobacterium necrophorum (Jensen et al., 1981). The incidence of diphtheroid laryngitis in feedlot cattle in the USA was estimated to be 1–2% (Jensen et al., 1981).…”

“…Laryngitis results from an interaction of mechanical mucosal lesions with following bacterial infection by Fusobacterium necrophorum (Jensen et al., 1981). The incidence of diphtheroid laryngitis in feedlot cattle in the USA was estimated to be 1–2% (Jensen et al., 1981). The characteristic clinical signs and the examination by laryngoscopy normally lead to a definite diagnosis of diphtheroid necrotic laryngitis (De Moor and Verschooten, 1968; Fischer, 1975; West, 1997; Milne et al., 2000).…”

Use of a national identification database to determine the lifetime prognosis in cattle with necrotic laryngitis and the predictive value of venous pCO2

“…1,2 It is among the more frequent causes of inspiratory dyspnea and stridor in cattle, and the incidence of necrotic laryngitis was estimated to be 1%-2% in United States feedlot cattle and 0.1 and 0.8% in dairy and Belgian blue beef veal calves, respectively. 2,3 It is generally accepted that the disease begins with mechanical mucosal lesions in the larynx, which are colonized by F. necrophorum. Cattle breeds with a more narrow larynx and relatively smaller lung volume (eg, Belgian blue) develop higher air velocity at the level of the larynx, which predisposes them to mucosal lesions and subsequently necrotic laryngitis.…”