There is fever, sometimes vomiting, painful swallowing, heat and dryness of the mouth, followed by an eruption of vesicles on the mucous membrane of the mouth, and very rarely by similar ones on the fingers.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
With the advance of the disease the vesicles widen and extend until they may reach a diameter ranging from that of a dime to that of a silver dollar.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The heart forces the blood through the artery into the tissue at considerable pressure, but owing to the fact that its return is prevented, the minute blood vessels rupture and the air vesicles become distended with blood, which coagulates and causes the firmness of the tissue.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler