Invasion of the Udder by Bacteria. 



289 



A considerable number of tubes of slanted agar were inoculated 

 with bits of tissue, the size of a pea, taken from the several regions 

 of the six udders comprising group 1. The results are summarized 

 in the following table. 



TABLE 1^0. lY. 

 Agar Slant Cultures Made prom TTdders, Group 1. 



Udder 



No. 



4 

 5 

 6 



No. 

 inocu- 

 lated. 



26 



15 



8 

 18 

 23 



Source. 



Regions A, B and C of 

 four quarters. 



Milk, right fore quarter. 



Region A, right fore quar 

 ter. 



Region B, right fore quar 

 ter. 



Region C, right fore quar- 

 ter. 



Region C, right fore quar 

 ter. 



5 each from A, B, C, right 

 fore quarter. 



A, B and C of right fore 



quarter. 

 A, B and C of right fore 



quarter. 

 A, B and C of four quar- 

 ters. 



Resulting growth. 



In 22, a confused mass of white, ocher 

 and lemon yellow colored colonies 

 of micrococci. Nos. 1, 2 and 3. 

 In 4, B. suhtilisit) only. 



Pure culture of micrococcus No. 1. 



Pure culture of micrococcus No. 2. 



Micrococcus No. 1 and spore bearer. 



Clear. 



Pure culture of mocrococcus No. 1. 



3 remained sterile, 12 exhibited a con 



fused mass of colonies of species 



1, 2 and 3. 

 Confused mass of colonies of species 



1, 2 and 3. 

 1 from A remained sterile. Remainder 



showed species 1, 2 and 3. 

 6 overgrown by a member of B. sub- 



tilis group. Remainder presented 



a confused mass of species 1, 2 



and 3. 



19 



