INFECTIOUS DISEASES. 87 



The inflamed condition of the clitoris causes the mare to 

 stretch herself and eject small quantities of urine at varying in- 

 tervals; the lips of the vulva open, the erect clitoris is shown, and 

 there is switching of the tail. 



On the body and legs are indolent swellings the size of a fifty- 

 cent piece; these may disappear and reappear in other places. 

 These swellings are said to be caused by an infiltration into the 

 papillary layer of the derma. 



The most serious symptom is the paralysis of the posterior ex- 

 tremities ; the animals drag their toes, rock their bodies, and cross 

 their legs somewhat similar to eases of spinal meningitis or influ- 

 enza. This paralysis is apt to be progressive, causing a dropping 

 of the ears, paralysis of the facial muscles, of the lips, eyelids, etc. ; 

 soon they go down, are unable to get up, get bed-sores, and die 

 from emaciation, paralysis, or are destroyed. 



Describe other symptoms seen in stallions. 



They are more difficult to notice in the male. The discharge 

 is usually less in quantity. There is swelling of the meatus, red- 

 spots or erosions over the sheath, which are often difficult to discern. 



Then paralysis of the hind extremities is shown, and death is 

 often preceded by symptoms of pneumonia. The lymphatic vessels 

 and the inguinal ganglia are involved at times. 



What are the conditions found on post mortem? 



These are not pathognomonic; the body is emaciated, and 

 where the tissues are cut through an anasmic condition is presented. 



In some cases swelling, thickening, and exudation into the 

 neurilemma, in posterior extremity, while in between the muscles 

 a gelatinous material may be seen. 



A congestion of the brain and spinal cord may be found, and 

 some of the nerves show signs of degeneration. An (edematous 

 condition of the vulva and neighboring parts may be present in 

 the mare, while the penis, sheath, and scrotum in the stallion show 

 like conditions. 



Give the prognosis. 



It is doubtful and grave. The course is irregular and chronic, 

 lasting six or eight months to two or three years. 



In the stallion it is more serious on account of liability of 

 spreading the disease more rapidly. Seventy per cent. die. 



