The isolation of cows at time of calving and the aborting animal is based upon the knowledge that the fetus, afterbirth, and uterine discharges of an affected animal at these times very frequently contain myriads of the abortion bacteria, and that unless these substances are confined and promptly destroyed an abundant opportunity is provided for the contamination of the food substances of the healthy animals and their contraction of the disease.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Aim to place all pregnant animals in disinfected individual pens or stalls a few days before they are expected to calve, and confine them to these quarters for three or four weeks following the delivery of the calf, or as long thereafter as uterine discharges are observed.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The fetus, afterbirth, provided it has been expelled, and all litter that has been contaminated with them and uterine discharges should be gathered up and destroyed either by burning or burying.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler