SYMPTOMS 183 



Since the lesions of tuberculosis vary so much in different 

 cases, it is not possible to give a description of what can be 

 designated the characteristic or even the usual symptoms ^of 

 this disease. There 

 are, however, certain 

 general manifesta- 

 tions that appear in 

 most of the advanced 

 cases, such as emacia- 

 tion while the appe- 

 tite continues good. 

 This is always a sus- 

 picious indication and 

 especially if accom- 

 panied by cough, 

 rough coat and tight, 

 harsh skin. Rough 

 or loud respiratory 

 sounds are suspicious, 

 and, in advanced 

 cases, it is often found 

 that the animal groans 

 when pressure is 

 brought to bear upon 

 the chest wall. Many 

 cases bloat habitually. 

 Hard, painless swel- 

 lings (enlarged lymp- 

 hatic glands) beneath 

 the skin in the region 

 of the escutcheon, 

 flank, shoulder or throat are suspicious. 



Fig. 31. Right lateral aspect of posterior 

 half of steer's head, (a) Lower jaw, (b) ear 

 passage, (c) horn, (d) styloid process of 

 occipital bone, [e) parotid gland, (f) sub- 

 maxillary gland. A. Right parotid lymph 

 gland. B. Right post maxillary lymph 

 gland. C. Right submaxillary lymph 

 gland. These glands are often the seat 0/ 

 tubercular deposits [Smith). 



the bottom, and the upper portion of the serum remains moist. The 

 only precaution to be applied to prevent infection with moulds is to. 

 thoroughly flame the joint between tube and cap as well as the plugged 

 end, before opening the tube. When test tubes are employed it is well 

 to dip the lower end of the plug into sterile molten paraffin and to cover 



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