134 



Report of the Department of Bacteriology of the 



all cows give high cell counts, i. e. higher than a half million or more 

 cells per cubic centimeter, at some time during their lactation period. 

 The grand average for the Station herd is only 439,000 cells per 

 cubic centimeter, a number much lower than that found in the case 

 of the other herds examined (See page 142). 



b. cell content of the milk of a herd of guernsey cattle. 



Table IV gives a record of the cell counts which were made on 

 March 2, 1911, of a herd of registered Guernseys owned by Mr. 

 A. G. Lewis of Geneva. All of these animals were tuberculin- 

 tested and free from tuberculosis and many of them were imported 

 animals, some having been imported within six months. The 

 stabling and care of the animals were excellent. The samples 

 were taken and the smears made by the author, but the cell counts 

 were made by Mr. Stidger. 



The grand average for the cells counts of these fifty-three animals 

 is 895,000 cells per cubic centimeter. Twenty-seven animals gave 

 counts of less than 500,000 cells per cubic centimeter, sixteen animals 

 gave counts between 500,000 and 1,000,000 cells per cubic centimeter, 

 while ten gave counts above 1,000,000 cells per cubic centimeter. 

 There is nothing peculiar in the record of the animals which give 

 the high counts so far as can be seen from the data which were 

 secured concerning them. 



Table IV. — Cell Content of the Milk of 53 Guernsey Cows. Test Made 



March 2, 1911. 



No 



7 



37 

 92 

 234 

 240 

 242 

 253 

 285 

 288 

 292 



Name of Cow. 



Pioneers Busy Bee 



Raymonds Maid 



Blanchflower of Lewisson. 



Lily of les Effards 



Blossom II of the Ponchez 

 Bessie of Mt. Plaisant VI . 



Flora of the Preel II 



Rosie of Baisseres Place. . 



Baymond's Primrose 



Bijou VII of Beaulieu. 



Number 



of cells 



per 



cubic 



centimeter. 



6,950,000 



1,915,000 

 165,000 



1,330,000 

 500,000 



3,440,000 

 235,000 

 265,000 

 390,000 

 370,000 



Pounds 

 milk 



in 

 Feb. 



? 

 158 



665 

 662 

 399 

 614 

 239 

 288 

 698 

 ? 



