204 SURGICAL DISEASES 



creased heat in the part is an important symptom. It is due to 

 the increased blood-tlow to the part. Because of the pigmented, 

 hairy skin of domestic animals, redness is of little value in 

 locating superficial inflammation. Swelling is a valuable local 

 symptom. It is produced by the inflammatory exudates. Pain 

 results from the pressure on the sensory nerves by the in- 

 flammatory swelling. For example, the laminix? of the foot are 

 imprisoned between the horny wall and the pedal bone. This 

 structure is well supplied with sensory nerves, and when it 

 becomes inflamed and swollen, the tissues are subject to severe 

 pressure and the pain is severe. Inflammation of a tendon re- 

 sults in lameness ; of the udder, in suspension of milk secretions ; 

 and of the stomach by interference with digestion of the feed. 

 Such symptoms may Ije grouped under the head of disturbed 

 functions. 



The character of an inflammation is largely modified by the 

 nature of the tissue in which it occurs. A serous inflammation 

 is characterized by serous, watery exudates. This form occurs 

 in the serous membranes, nmcous membranes and skin. Blisters 

 on the skin and inflammation of bursas (capjied hock and shoe 

 boil) are examples of this type. Sero-fibrinous inflammations, 

 such as occur in pleurisy and peritonitis, are common. Chronic 

 inflammation commonly results in new formations of tissue, 

 and it is named according to tlie character of the new tissue 

 formed, as ossifying, adhesive, and fibrous inflammation. Pus- 

 forming bacteria produce suppurative inflammation. Such dis- 

 eases as tuberculosis, glanders and hog-cholera are specific in- 

 flammations. Specific infectious diseases may be classed as 

 generalized inflammation, as they usually involve the entire 

 body. 



Inflannnation terminates in resolution when the serum is 

 reabsorbed by the blood-vessels and lymphatics, the living blood- 

 cells find their way back into the circulation and the dead cells 

 disintegrate and are taken up by the vessels. The time required 



