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.
References
1.
BagdonasV.OlsonC.:
Observations on the epizootiology of cutaneous papillomatosis (warts) of cattle.J Am Vet Med Assoc122:
393,
1953
2.
BrobstD.F.OlsonC.:
Neoplastic and proliferative lesions of the bovine urinary bladder.Am J Vet Res24:
105–111,
1963
3.
BrunnerD.W.GillespieJ.H.:
Hagen's Infectious Diseases of Domestic Animals,
6th edition,
pp. 262–268.
Comstock Publishing Associates, Cornell University,
Ithaca, New York,
1973
4.
CreekG.T.:
Experimental studies of the etiology of common warts in cattle.J Agric Res39:
723–737,
1929
5.
DavisR.W.:
Necrotic laryngitis in the bovine.
Thesis
1952.
Library, Colorado State University, Fort Collins, Colorado
6.
JensenR.LauermanL.H.BraddyP.M.HortonD.P.FlackD.E.CoxM.F.EinertsonN.MillerG.K.RehfeldC.E.:
Laryngeal contact ulcers in feedlot cattle.Vet Pathol17:
667–671,
1980
7.
McEnteeK.:
Fibropapillomas of the external genitalia of cattle.Cornell Vet40:
304–312,
1950
8.
OlsonC.GordonD.E.RoblM.G.LeeK.P.:
Oncogenicity of bovine papilloma virus.Arch of Environ Health19:
827–837,
1969
9.
PulleyL.T.ShivelyJ.N.PawlickiJ.J.:
An outbreak of bovine cutaneous fibropapillomas following dehorning.Cornell Vet64:
427–434,
1974
