EXPERIMENT STATION BULLETINS. 481 



DIVISION OF BACTERIOLOGY AND HYGIENE. 

 Technical Bulletin No. 10. 



BY ZAB NORTHRUP. 

 FOREWORD. 



Producers of milk and sanitary officers are not infrequently confronted 

 with the disposition of milk which is under suspicion because of possi- 

 ble typhoid infection. Creameries and cheese factories as well as fer- 

 mented milk drinks have been suggested as outlets where other means, 

 as pasteurization, or other avenues are closed. Accordingly, the con- 

 crete subject, bearing upon the viability of B. typJwsus in milk under- 

 going lactic fermentation, is advanced. It is the purpose of this bulletin 

 to answer the questions involved in this subject as fully as is possible. 



The variability in the actions of varieties of lactic organisms upon 

 B. ti/pJiosus proves exceedingly interesting and pertinent. Bact. hul- 

 garicimi with its high acid qualities does not seem proportionately as 

 effective as the more common types of lactic organisms. 



CHARLES E. MARSHALL. 



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