It is claimed that stables thoroughly cleaned become safe after drying for a short time; hence, litter of all kinds, such as manure or soiled hay and straw, may remain infective for a longer time because they do not dry out.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It has frequently coincided with abortions and failures to conceive in the same herd, so that it has been thought that the same infective germ produces one type of abortion.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Those that recover from an attack, however, are liable one or two weeks later to suffer from an infective inflammation of the lungs.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler