94 Dairy Bacteriology. 



the virus of the disease may he conveyed in hutter. 1 This 

 disease is practically unknown in this country, although 

 widely spread in Europe. 



There are a number of other hovine diseases such as 

 anthrax, 2 lockjaw, 3 and hydrophobia 4 in which it has been 

 shown that the virus of the disease is at times to be found 

 in the milk supply, but in most cases the secretion of milk 

 becomes visibly affected, so that the danger of using such 

 is greatly minimized. 



There are also a number of inflammatory udder troubles 

 known as garget or mammitis which are produced by bac- 

 terial action. In most of these, the physical appearance 

 of the milk is so changed, and often pus is present to such 

 a degree as to give a very disagreeable appearance to the 

 milk. Pus-forming bacteria (staphylococci and strepto- 

 cocci) are to be found associated with such troubles. 



DISEASES TRANSMISSIBLE TO MAN THROUGH INFECTION OF 

 MILK AFTER WITHDRAWAL. 



Milk is so well adapted to the development of bacteria 

 in general, that it is not surprising to find it a suitable 

 medium for the growth of many pathogenic species. While 

 this statement applies primarily to milk in a sterile condi- 

 tion, yet in some cases, disease-producing bacteria are even 

 able to grow in raw milk in competition with the normal 

 milk bacteria, so that even a slight contamination may 

 suffice to produce infection. 



The diseases that are most frequently disseminated in 



i Schneider, Munch, med. Wochenschr., 1893, No. 27; Frohner, Ziet. L Fleisch 

 u. Milchhygiene, 1891, p. 66. 

 "Feser, Deutsche Zeit. f. Thiermed., 1880, 6:166. 

 Nocard, Bull. Gen., 1885, p. 54. 

 Deutsche Viertelsjahr. f. offentL Gesundheitspflege, 1890, 20:444. 



