In such animals death occurs in 6 or 8 days, but the mortality in the serious Outbreaks thus far investigated has been less than 0.5 per cent.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
From 10 to 20 days are usually required for the recovery of the normal appetite and spirits in mild Outbreaks, while the return to a full flow of milk, in the case of milk cows, seldom occurs before the arrival of the following season.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It will be observed that in all these early Outbreaks the contagion was introduced with imported animals.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler