Finally, tetanus may be distinguished from rabies by the fact that the central nervous system does not contain the infectious principle, while in rabies the inoculation of test rabbits with the brain or cord of a rabid animal will produce the disease with characteristic symptoms after an interval of 15 to 20 days.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
tetanus may readily be differentiated from rabies by the persistence of muscular cramps, especially of the face and abdomen, which cause these muscles to become set and as hard as wood.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Among these are tetanus, blackleg, anthrax to a large extent, and perhaps actinomycosis in part.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler