SPOROGENES TEST. 



15 



Table 5. — The sporogenes test tvith milk produced under unknotvn conditions 

 and milk produced under dirty conditions. 



COMMERCIAL PASTEURIZED MILK. 



Sample 

 No. 



Sporogenes test in sets of 10 tubes 



with 10 c. c. 



of milk. 



Posi- 

 tive 

 tests. 



Bacterial 

 count. 



1 



+ 





















1 



3,100 



2 



+ 



+ 



+ . 



+ 















4 



3,500 



3 



+ 



+ 



+ 



+ 















4 



4,800 



4 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



8 



5,700 



5 



+ 



+ 



+ 



+ 















4 



10, 400 



6 



+ 



+ 



+ 

















3 



10, 800 



7 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



10 



12, 400 



8 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



9 



12, 500 



9 



+ 



+ 



+ 

















3 



13, 700 



10 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



8 



15, 600 



11 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



10 



15, 800 



12 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



— 



7 



17, 600 



13 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



9 



17, 800 



14 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



8 



17, 800 



15 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



9 



18, 800 



16 



+ 





















1 



19, 200 



17 



+ 



+ 



















2 



19, 300 



IS 



+ 



+ 



















2 



20, 200 



19 



+ 



+ 



+ 



+ 















4 



20, 300 



20 



























22, 800 



21 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



— 



— 



6 



24, 700 



22 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



9 



25, 200 



23 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



— 



— 



— 



7 



26,900 



24 



+ 



+ 



+ 



+ 















4 



30,600 



25 



+ 



+ 



















2 



41,900 



26 



+ 





















1 



57, 000 



27 



+ 



+ 



+ 



+ 















4 



80, 000 



28 



+ 



+ 



+ 



+ 



+ 













5 



345, 000 



MILK PRODUCED UNDER DIRTY CONDITIONS; COWS DIRTY; UTENSILS NOT 



STERILIZED. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 



+ 



+ 



+ - 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 

 + 

 + 



+ 

 + 

 + 



+ 

 + 



+ 

 + 

 + 

 + 

 + 

 + 



+ 



+ 

 + 

 + 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 

 + 

 + 

 + 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 

 + 

 + 

 + 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 



+ 



+ 



+ 

 + 



+ 



+ 

 + 



+ 

 + 



+ 



7 

 3 

 6 

 2 

 6 

 3 

 7 

 1 

 2 

 9 

 6 

 2 

 7 

 7 

 3 

 6 

 10 

 6 



33, 000 



46, 000 



101, 000 



106, 000 



107, 000 



112, 000 



118,000 



129, 000 



245, 000 



320, 000 



750, 000 



1,340,000 



1,810,000 



2, 900, 000 



11,600,000 



22, 500, 000 



25, 000, 000 



61, 000, 000 



If the sporogenes test is any criterion, it seems evident that the 

 pasteurized milk for the most part was not produced under very 

 clean conditions. It would appear that in general the conditions of 

 production were probably similar to those under which the samples 

 represented at the bottom of the table were produced. 



While information as to the production, indicated by the sporogenes 

 test, could not be relied upon to do more than suggest probable condi- 

 tions, the test might profitably be applied occasionally to milk from 

 individual farms in connection with control work. 



