20 Commission Report: Tuberculosis. 
In the order of seeming importance the means of location may 
be placed as follows: 
I. NOTIFICATION. 
A law should be enacted requiring any and every person having 
knowledge of the existence of a case of tuberculosis among cattle 
to report the same without delay to some proper, designated 
authority. Such a law would be practically equivalent to the 
obligatory reporting of all clinical cases of tuberculosis which 
must be recognized as the most serious disseminators of tubercle 
bacilli and propagators of tuberculosis. 
Since all cases of tuberculosis that are centers from which in- 
‘fection is being scattered, gradually become clinically recognizable, . 
obligatory notification of all recognized cases of tuberculosis 
would alone in the course of a few years locate the majority if 
not all badly diseased herds. It would certainly locate tuber- 
culous cattle and herds faster than they can be handled for some 
years to come. 
7 Il. EVIDENCE THROUGH MEAT INSPECTION. 
An effort should be made to trace tuberculous animals back from 
slaughter-houses to the farms from which they were derived. 
‘This is important because if the well-conditioned animals which 
go to slaughter for meat are tuberculous it is probable that among 
the animals retained on the farm some active disseminators of 
tubercle bacilli exist, which are retained at the farm either through 
ignorance or a false idea of economy. 
Meat inspection has already done much to establish infected 
areas from which tuberculous animals have been sent to market. At 
present, however, it is difficult to trace animals to the farms from 
which they were shipped, and some method of identification by 
means of which any animal found on the killing floor to be tuber- 
culous can be traced to its place of origin is greatly to be desired. 
A federal law requiring’ appropriate tagging, branding or other- 
lide Mele cies 
these aniinals moving within tie st . one - ee ae 
means of locating a ae pat of th ‘ ae eA RA a 
Experimental work of this character which by ae aes 
as been: carried out 
