1S4 IIkport of the Chemical Dkpariment of tue "■ 



Taule V. — XuMBEB OF Bacteeia Per Cubic Centimeter in Whole-Milk 



AND Strippings. 



Front left Front right Baok left Back rlt;ht 



quarter. quarter. quarter. quaner 



Whole- Strip- Whole- Strip- Whole- Strip- Whole- Strlp- 

 nillk. pings. milk. pings. milk. pings. milk. pings. 



June 11, p. m 53 2G 5G 140 173 401 710 



June 12, a. m 646 244 210 429 442 403 G29 1870 



June 12, p. m 88 22 30 305 90 105 789 975 



These data strongly support the idea that the interior of the 

 udder in such cases is seeded with these organisms, which are 

 generally yellow cocci, capable of liquefying gelatin. 



Most striking are thase cases in which the interior of certain 

 quarters of the udder is highly contaminated with certain organ- 

 isms for long periods, while, at the same time, one or more 

 quarters of the udder in the same animal may remain comi)ara- 

 tively free from germ life. In the case of the cow used in 

 collecting the data shown in the above table, examinations of 

 the strippings were made extending over four months. Samples 

 were collected by catching one of the last streams from each 

 quarter in a sterile test tube, except in a few cases in which 

 they were drawn with a sterile milking tube. The samples were 

 taken at once to the laboratory and plates prepared containing 

 1 cc. and 0.5 cc. of the milk. The results are shown in the 

 following table; 



Table V A. — Number of Bacteria Per Cubic Centimeter in the 



Strippings of Cow No. 8. 



Front Front Baok Back 



Date. left right left right 



quarter, quartt-r. quarter. quarter. 



May 26 22 296 372 



June 11, p. m 26 56 173 716 



June 12, a. m 244 429 493 1870 



June 12, p. m 22 305 105 975 



July 12 22 48 2106 488 



July IS 36 55 280 86S 



July 27 211 10 3SS 628 



Sept. 7 391 3684 631 656 



Sppt. 20 132 450 356 9967 



Oct. 10 6 87 138 232 



This table shows that in general the strippings from the back 

 right quarter had a germ content of .")00 to 800 per cubic centi- 



