As young cows are most susceptible to variola, the milker must exercise constant patience with these affected animals so long as their teats or udders are sore and tender, else the patient may contract vicious habits while resisting painful handling.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The results of numerous experiments which have been carried out for the purpose of determining the relationship existing between variola of the human and bovine families seem to show, however, that although possessing many similar characteristics, they are nevertheless distinct, and that in spite of repeated inoculations from cattle to man, and vice versa, no transformation in the real character of the disease ever takes place.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
variola of the horse is readily transmitted to cattle, if both are cared for by the same attendant, and, conversely, variola of cattle may be carried from the cow to the horse on the hands of a person who has been milking a cow affected with the disease.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler