22 
Farmers’ Bulletin 1069. 
ERADICATION FROM AREAS. 
The unit territory to be worked will depend mainly upon the extent 
to which the disease has spread. In some States practically every 
county contains numerous tuberculous herds, so that, to control the 
disease effectively, all the herds must be tuberculin tested. In other 
States, however, the disease is confined to the beef and dairy herds 
recently established or to which new animals have lately been added. 
In the latter case it would not be necessary to test all the cattle, but 
the examination of the herds should be sufficient to demonstrate 
most satisfactorily that no diseased herds are overlooked. This can 
be done by testing several herds in each section of the county wherever 
there is a suspicion that the disease may exist. 
As a general plan, it is best to take up the work by counties, and 
substantial cooperation should be obtained from the county govern¬ 
ment. Each county should pay (1) part of the expense of extermi¬ 
nating the disease by employing inspectors to make the tests, (2) part 
of the indemnities paid for tuberculous animals, and (3) its share of 
the cost of cleaning and disinfecting infected barns, stables, and sheds. 
When a large percentage of the herds of a county are diseased, it is 
advisable to clean up the herds within a township or possibly one- 
third or one-half of the area. The progress depends upon the degree 
of infection found and the cooperation furnished by the owners. 
Fig. 13.—An accredited Guernsey herd, Wisconsin. 
