7. A portion of the ear of the same animal, showing same full-grown Ticks ready to drop off.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
After the acute stage of the fever has passed the Ticks begin to swell up and show very plainly.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
When native cattle are placed upon fields on which young Ticks are already present, they will show the fever in 13 to 15 days if the season is hot.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler