LESIONS IN ABDOMINAL CAVITY 147 



examinations in cases which gave a history of prolonged illness, 

 with all the usual symptoms of chronic cholera, but in which post- 

 mortem examination revealed absolutely no ulceration in the bowel. 

 Diagnosis in these cases was based on the findings in the kidney, 

 and injection of blood from these animals into healthy pigs 

 produced typical cholera, so that there can be no question that 

 the disease was cholera; yet, with a long-drawn-out course, there 

 was an absence of bowel ulcers. Accordingly, we cannot insist on 

 finding ulceration of the bowels to pronounce a case cholera. It 

 must be remembered that we can have cholera, and cholera of the 

 very worst form, with no ulcers in the bowels, and also very little 

 apparent bowel disturbance, such as diarrhea. 



Changes in Testicles. — These organs are seldom involved in 

 cholera in young uncastrated males. Occasionally in old boars the 

 testicles and scrotum swell up during the course of the disease, and 

 it is not uncommon in these cases to have the animal rendered 

 worthless for breeding purposes as a result. The swelling of the 

 testicle destroys its power to secrete, and often closes the tube or 

 duct which leads from the testicle to the urethra. 



In connection with the use of serum injections in the male 

 animals it should be borne in mind that there is always danger of 

 causing a swelling of the scrotum and testicles if the serum be used 

 in that region. For this reason, it is advisable not to inject the 

 serum in the hams in boars, but rather to inject in the subcutaneous 

 tissues just behind the ear. Observance of this point will save the 

 serviceable value of many high-priced breeding animals. 



Other Changes in Abdominal Cavity. — We have already con- 

 sidered all the important organs in the abdominal cavity. After 

 the organs have been removed it is well to examine the deep 

 lymphatic glands — that is, the sublumbar, precrural, and iliac. 

 The location of these glands and the character of the changes found 

 have already been described under the head Lymphatic Gland 

 Involvement. 



In connection with general examination of the abdominal cavity 

 it may be noted that the peritoneum — the shiny serous lining of the 

 abdomen — has lost its bright, glistening appearance, and shows a 

 tendency to be dark, dull, and lusterless. It rapidly discolors 

 when exposed to air, and the entire carcass rapidly decomposes. 



