Other means of diagnosis, which have reference to the specific bacilli, to the Inoculable character of the virus upon small animals, and which are of decisive and final importance, can be utilized only by the trained bacteriologist and veterinarian.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The disease is therefore Inoculable rather than contagious.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler