Symptoms in Cattle. 



557 



become parallel or converge instead of diverging (Ostertag, 

 Fig. 90). _ At the npper border of tlie udder either on the 

 affected side or on both sides the enlarged lymphatic glands 

 may be located by palpation (Fig. 89). In exceptional cases 

 the snperniammary lymph glands may be enlarged and the ndder 

 itself present a normal appearance. In these eases, however, 

 it may be assumed that in all probability the udder itself is 

 also infected. In very rare eases the affection begins with 

 increased local temperature and moderately painful swelling 

 of one quarter but in the course of a short "time the above de- 



Fig. 88. Tuberculosis of the light hin:l quar- Fig. 89. Tuberculosis of the left 

 ter of the udder with pronounced atrophy of tlie liind quarter of the udder with exten- 

 glandular tissue. Enlargement of the precrural sive enlargeniciit of the left super- 

 lymph gland, mammary gland ^nj. (Ostertag.) 



scribed characteristics appear. In other rare eases chronic con- 

 ditions will become acute, the diseased quarter becomes more 

 tumefied and painful, there is increased temperature and the 

 neighboring lymph glands show acute enlargement (Lucet). 



In regard to milk production, contrary to what occurs in 

 other inflammatory processes of this organ, no interruption 

 occurs for some time in the course of tuberculous disease. As 

 the morbid processes advance, however, the secretion gradually 

 diminishes until it ceases entirely in the affected quarters. In 

 the meantime the milk, which is at first normal in appearance, 

 becomes thin and greenish-yellow in color (Fig. 92). Later, 



