BACTERIA IN THE UDDER 35 
sumers. The bacteria of tuberculosis may be 
discharged from the udder of a tuberculous cow 
in the same way. 
The first step in clean milk production con- 
sists in regular examination of cows’ udders to 
see if they are free from inflammation. 
Dairy farmers must reject all milk which con- 
tains lumps, or is thick, or deposits gummy material 
on the milk strainer. 
