Tuberculosis is the most widely spread of all diseases. This is true, whether we view the question from a zoologic or a geographic standpoint. This extent of distribution must be taken into account in determining the importance of the disease, the possibility of eradicating and the means of combating it. I will state first many somewhat isolated facts, and later I will draw conclusions.
ZOOLOGIC DISTRIBUTION.
Cattle.
—Amongst domestic animals the cow is unquestionably most important from the standpoint of the danger from tuberculosis. The reason for this is that the one very abundant source of nourishment that is eaten raw is derived from the cow. The eating of uncooked meats, of half-done or smoked sausages, threatens a limited number of people. The drinking of milk threatens all the people. The artificial conditions under which milk cows are kept, the warm, snug, draught-free, and therefore dangerous, stables, the forced feeding