Cause.—Investigations lead us to believe that it is due to protozoa. So far, the true micro-organism has not been discovered. This disease is very contagious and is transmitted by direct communication but not through the air. Perhaps the most common way of transmitting the disease is by the hands of the milker.

Symptoms.—A slight rise in the temperature, especially that of the udder and teats. They are red, swollen and tender and after three or four days small pimples or pustules will appear on the teats, about the size of a pea. The pimples or pustules become larger and within a few days may attain the size of one-half inch in diameter. At the end of the second week the pimples or pustules burst and discharge an amber colored fluid leaving raw sores, which cause the animal to suffer intensely when being milked. The supply of milk is also markedly decreased in this condition.

Prevention.—A person should not milk both healthy and diseased cows unless the hands are thoroughly washed in a Carbolated Solution; the clothes that are likely to come in contact with the udder, coat sleeves, etc., changed.

Treatment.—It is advisable to give a physic as it has a very good effect on the blood, such as Aloin, two drams, and Ginger, two drams, which is easily prepared and administered by placing in capsule and giving with capsule gun.

Also, the application of Zinc Ointment two or three times a day affords immediate relief and causes the sores to heal rapidly. Good results are also obtained by feeding food that is easily digested, as bran mashes, steamed rolled oats and vegetables.