540 Veterinary Medicine. 



Lesio7is. These appear to vary with the progressive advance 

 of the malady. In an ass which was killed as soon as paraplegia 

 appeared and the necropsy made at once, the lesions were confined 

 to the vulva, vagina and bladder. In advanced ca.ses the ureters 

 and kidneys are visibly involved together with the spinal cord, 

 especially in the lumbar region, and in certain instances the brain. 



The vulva is swollen, held habitually open so as to expose the 

 erect clitoris ; the mucosa is irregularly swollen and petechiated, 

 and there is a glairy or bloody discharge. The .swelling u.suallj'' 

 extends to the inner side of the thighs, the mammary glands and 

 the adjacent wall of the abdomen. The vaginal mucosa is con- 

 gested, swollen so as to bulge irregularly at intervals and covered 

 with a glairy mucopurulent matter often mingled with clots of 

 blood. The urethra and bladder are red and congested, with 

 marked thickening and ecchymosis of the mucosa and an abund- 

 ant serous exudate which extends into the muscular and peii- 

 toneal coats as well. Minute extravasations are found in the two 

 outer coats and petechise of the serosa is the rule. In fatal cases 

 the ureters and kidneys are involved, the renal parenchyma is 

 greatly congested and softened, the cortical part especially being 

 of a dark red, and the glomeruli distinctly enlarged. An oily 

 sanguineous liquid can be squeezed from the cut surface. The 

 lumbar portion of the .spinal cord together with its meninges, is 

 congested and arborescent, and in bad cases this may extend 

 upward to the head and involve the brain and its coverings. 



There is general congestion of the venous .system with black 

 blood, especially noticeable in the arborescent lines on the inner 

 surface of the skin and in the serosse, and the liver and spleen 

 are gorged with black blood, which, however, reddens on expos- 

 ure to the air. Mu,scles and parenchymatous organs may show a 

 parboiled appearance. In the male the swelling appears about 

 the sheath and penis, the papilla, the urethral mucosa and that of 

 the bladder are deeply congested and petechiated, and the kidneys 

 and medulla may be implicated as in the mare. 



Symptoms. In the mare the early symptoms are the swelling 

 and gaping of the vulva, with the mucopurulent or sanguineous 

 discharge and the presence of redness, congestion and petechise of 

 the mucous membrane. 



In the horse there is swelling of the sheath and a pendant con- 



