Tuberculosis. 491 



this does not seriously impair the financial success, and living in 

 the open air they bring little danger to others. The loss is in- 

 finitesimal as compared with the expense of milking a large 

 herd, sterilizing the milk and feeding it by hand. Advanced 

 cases, with objective symptoms, should always be removed, and 

 the cows may be tested at intervals if compatible with profit. 

 The seclusion of the herd should be complete, by distance, by the 

 configuration of the country, or by fence. 



For this system the climate of our Southern States, where stock 

 can remain out of doors all the year, offers a better field than the 

 semi-arctic northwest. 



Removal of all Unthrifty Animals and Those Showing Physical 

 Symptoms of Tuberculosis. Before the days of tuberculin testing 

 I succeeded in extingushing tuberculosis in several herds by the 

 prompt removal of all unthrifty animals and such as showed 

 objective symptoms of tuberculosis, the disinfection of the build- 

 ings, the restocking from sound herds, and the strict separation 

 of the new stock from the old. In one herd of 200 this entailed 

 the final destruction of the whole original herd ; in others the 

 destruction was in the main limited to particular (susceptible) 

 families. But in these days, with the tuberculin test available, a 

 resort to a method of this kind would produce an unnecessarily 

 slow, uncertain and expensive result. 



Removal of Animals Shozving Objective Symptoms or Reaction 

 tinder Tuberculin. The Bang (Danish) method is the chief ex- 

 ample of this, and is so considerate of both state outlay and 

 stock owner's interests that it is deserving of high praise. Under 

 it the State usually waits for the stock owner to take the initiative, 

 but to encourage applications from the owners, it furnishes tuber- 

 culin testing without expense, and even allows a small indemnity 

 for animals killed because of advanced tuberculosis. In return 

 for this the stock owner agrees to furnish separate buildings (or 

 enclosures) yards and pasturages, new or, when necessary, disin- 

 fected, one set for the high conditioned, nonreacting, healthy 

 herd, and a second for the animals that reacted but which show 

 no further sign of tuberculosis, with separate attendants, utensils 

 and other appointments for each. This reacting herd is furnished 

 with the best of food, air, accommodation and hygiene general^, 

 and the milk is sterilized before it is allowed to pass into consump- 



