It is first catarrhal in character, but soon a false or diphtheritic membrane is formed, with the production of shallow ulcers.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
A catarrhal condition of the digestive tract is usually observed.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The catarrhal inflammation produced by adenoids in the nasal mucous membrane travels up the lachrymal duct and thus infects the conjunctiva by contiguity.
"Civics and Health"
William H. Allen