INFLUENCE OF DISEASE UPON MILK 79 
demonstrated. Six other children and one adult were 
found with swelling of the cervical lymph glands, four 
children and one adult showed symptoms indicative of 
abdominal tuberculosis and one child suffered from 
scrofula, but in these cases no material could be obtained 
for bacteriological examination. Forty-one other persons 
showed various symptoms of disease, but tubercle bacilli 
could be demonstrated in only 4, and these bacilli were of 
the human type. The other 304 individuals who had used 
milk from the tuberculous udders, or products made from 
such milk, showed no symptoms of disturbed health in 
1910. Subsequently, one of these, a girl, developed a 
peritonitis for which the infected milk was probably re- 
sponsible. While in some instances the milk was heated, 
mixed with milk from apparently healthy cows, or only 
a small quantity was used in tea or coffee, nevertheless the 
results of this investigation would indicate that a con- 
siderable amount of infectious material and favorable 
accessory conditions are required to infect man with 
bovine tuberculosis. But, as Weber himself has pointed 
out, it must be remembered that it is not known positively 
that the individuals manifesting symptoms suspicious of 
cervical lymph gland and abdominal tuberculosis were 
not actually infected, nor how many of the apparently 
healthy persons concerned were affected with lat- 
ent tuberculosis which may later, under some debilitat- 
ing influence, become active and progress to a fatal 
termination. 
Furthermore, Weber’s observations are not confirmed 
by others who have studied the frequency of the trans- 
mission of bovine infection to man by milk. ‘A comparison 
of the occurrence of tuberculosis in breast-fed children 
