138 APPLIED BACTERIOLOGY FOR NURSES 



Matzoon, yoghurt, zoolak, fermilac, etc., are made 

 from sterilized milk by fermentation with lactic acid 

 bacteria. These preparations contain neither alcohol 

 nor carbonic acid gas. 



Detailed directions for the preparation of various 

 kinds of fermented milks will be found in nurses 1 cook 

 books, and in the circulars supplied with the various 

 lactic acid bacillus cultures on the market. 



