Streptococci and Leucocytes in Milk. I
The undoubted fact that milk may act as a vehicle for the transmission of a number of diseases has directed considerable attention to the Bacteriological and Public Health aspects of milk. Yet it cannot be said, tuberculosis excepted, that the bacteriological examination of milk has afforded in the past much assistance in the prevention of disease, while only very occasionally has a subsequent examination served to elucidate the cause and origin of a milk-spread epidemic. A survey of the literature of the subject will show that although extensive work has been carried out upon the bacteriology of milk, the subject is so large and many-sided that what is known is but an insignificant proportion of what requires to be ascertained. A great deal of the work done has been in relation to tuberculosis. Almost all the milk examinations have been carried out with mixed milk samples, and not with quite fresh milk from individual cows.