SPOROGENES TEST. 



17 



Table 6. — Relation of the sporogenes test to milk produced under varying 



conditions. 



MILK PRODUCED IN DIRTY BARN: COWS DIRTY; UTENSILS NOT STERILIZED. 



Sample 



No. 



Sporocenes test in sets of 10 tubes, with 20 c. c. of milk. 



Posi- 

 tive 

 tests. 



Bacterial 



count. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 



+ 



-i- 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 

 + 

 + 



+ 

 + 

 + 



4- 



+ 

 + 



+ 



+ 



+ 



+ 

 + 

 + 

 + 

 + 

 + 

 '+ 

 + 

 4- 

 + 

 + 



+ 

 + 

 + 



+ 

 + 

 + 



+ 



+ 

 + 

 + 

 + 

 + 



+ 

 + 



+ 



+ 

 + 

 + 



+ 



+ 



+ 

 + 

 + 

 + 

 + 



+ 

 + 

 + 



+ 



+ 



+ 



+ 

 + 

 + 



-i-" 



+ 



+ 

 + 



+ 

 + 



+ 



+ 

 + 



+ 



+ 



+ 



+ 



+ 

 + 



+ 



+ 



+ 

 + 



+ 



+ 



+ 



+ 

 + 



+ 



9 

 7 

 6 

 2 

 9 

 5 

 9 

 3 

 4 



10 

 4 

 3 



10 

 7 

 6 

 7 



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 



SAME AS ABOVE, EXCEPT UTENSILS STERILIZED. 



1 



2 

 3 



4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 



4- 

 -i- 



+ 

 + 

 + 

 + 



+ 

 + 



+ 

 + 

 + 

 + 



+ 



+ 

 + 



+ 

 + 

 + 

 + 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 

 + 



+ 

 + 

 + 

 + 

 + 



+ 

 + 

 + 



+ 

 + 

 + 



+ 

 + 



+ 

 + 

 + 



+ 



+ 

 + 



4- 



+ 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 



+ 

 + 



+ 

 + 



+ 

 + 

 + 



+ 



+ 



+ 



+ 

 + 



+ 



+ 

 + 



+ 

 + 



+ 

 + 



+ 

 + 



+ 



+ 



+ 

 + 



10 

 7 

 9 

 3 

 8 

 2 

 



10 

 4 



10 

 6 

 4 

 3 

 4 

 8 

 1 

 7 

 8 



19, 000 



26, 000 



32, 000 



37, 000 



41,000 



56, 000 



64, 000 



68, 000 



76, 000 



102, 000 



146, 000 



163,000 



168, 000 



182, 000 



186, 000 



242, 000 



245, 000 



560, 000 



BARN FLOOR CLEAN; COWS CLEAN; UTENSILS NOT STERILIZED. 



1 



2 

 3 



4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 



+ 

 + 



+ 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



+ 

 + 



+ 

 + 



+ 



+ 



+ 



+ 

 + 



+ 



4- 

 + 



+ 

 + 



+ 



+ 



+ 



- 



- 



1 



3 





 



1 



8 

 

 1 

 1 

 1 

 4 

 5 

 1 

 2 

 1 

 



1.310,000 



1,170,000 



4, 200, 000 



4,300,000 



4,400,000 



4,500,000 



4,800,000 



7,600;000 



8,400,000 



9,200,000 



13,600,000 



18,900;000 



23', 900, 000 



32, 800, 000 



38,000,000 



64,000,000 



The results of the sporogenes test with milk produced from clean 

 cows but with dirty utensils tend to confirm this opinion. It will 

 be noted that there was a decided drop in the number of positive 

 tubes in the sporogenes test, although occasional samples did show 

 a rather large number. 



