A soluble cell extract prepared from the characteristic nodules formed in the lungs of animals suffering from tuberculosis and used as a skin test to diagnose the disease. One of the most elementary forms of life consisting of genetic material surrounded by a protein coat, having the ability to replicate only inside a living cell and cause disease in more complex organisms. Any of the flies whose larvae form warble in cattle and other animals. An abscessed swelling under the hide of the back of cattle or other animals caused by the larvae of the warble fly. Calf disorder caused by a combination of poor nutrition and weather stress.
Calves show severe depression, general weakness, arched backs, and inability to stand and nurse.
The watery part of milk that separates from the curds, as in the process of digestion or cheese making. The high point of an animal's back located at the base of the neck and between the shoulder blades. Disease communicable from animals to humans and vice versa under natural conditions.