GENERAL DISEASES. 87 



are replaced by others. There is oedema of the abdomen and 

 extremities, and some engorgement of the submaxillary 

 glands. 



The symptoms gradually disappear in two weeks to two 

 months. 



In the stallion, beyond swelling of the sheath, this form 

 of the maladie du coit is unnoticeable. 



The benign may pass into the malignant form in either 

 sex. 



Symptoms of the Malignant Form. — In the mare the 

 symptoms begin in the same way as in the benign form, 

 but soon become more pronounced. 



The lips of the vulva alternately swell and diminish in 

 size. The anus, mammary gland, and perinseum are 

 swollen ; the vaginal mucous membrane presents furrows, 

 becomes more infiltrated, and presents blue and yellow 

 patches, and pustules are formed on its surface. The dis- 

 charge from the vagina is excoriating. Lenticular pustules 

 may appear on the external surface of the lips of the vulva, 

 on the perinseum, and inside the thighs. Scabs form over 

 them and leave circular ulcers, which heal rapidly. The 

 clitoris is swollen, and the discharge becomes reddish 

 green and fetid. Urine is ejected frequently and in small 

 quantities, and causes much irritation when passed. 



Mares in foal usually abort at the third month, and if the 

 foal is born it is dead or soon dies. 



In the stallion the symptoms are very uncertain ; the 

 disease may remain latent for a very long time. The sheath 

 is oedematous, and the swelling may extend in front and 

 behind it. The testicles may or may not become swollen. 

 The penis also may or may not be altered; sometimes 

 purple spots are found, and the glans during erection 

 may be very large. The urethral mucous membrane pro- 

 jects in a globular form from the meatus, and is crimson 



