The separation of the tubercular from the healthy cows must be complete. Separate buildings, yards and pastures that do not join the quarters where the healthy animals are kept should be provided. The person attending the reactors should not attend the healthy animals, and separate forks, shovels, pails and other utensils should be provided for the two herds.
The best method of controlling tuberculosis in hogs is to slaughter all reactors, disinfect yards and houses and move the herd. If the old quarters are free from filth and carefully disinfected, the hogs may be returned without danger of infection after six months. A retest of the herd should be made before returning them to the permanent quarters and the reactors slaughtered.
QUESTIONS
1. Give the history of the early experimental work in tuberculosis; give the common methods of spreading the disease.
2. What are the symptoms and post-mortem lesions in tuberculosis?
3. Give the method of controlling tuberculosis.
CHAPTER XXVIII
INFECTIOUS DISEASES COMMON TO THE DIFFERENT SPECIES OF DOMESTIC ANIMALS
SEPTICAEMIA AND PYAEMIA.—The term commonly used in speaking of simple septicaemia and pyaemia is blood poisoning.
These infectious diseases are caused by several different species of bacteria that gain entrance to the tissues by way of wounds. The bacteria that cause pyaemia are transferred by the blood stream to different organs and produce multiple abscesses. In septicaemia, the bacteria may occur in immense numbers in the blood and produce a general infection of the tissues, causing a parboiled appearance of the liver, heart, voluntary muscles and kidneys, and enlargement of the spleen. The two forms of infection are often present at the same time.