SYMPTOMS AND LESIONS 39 



on the vulva, and in the perineal region. Depend- 

 ing on whether the color results from hyperemia 

 or hemorrhage, it will or will not disappear on 

 pressure. Sometimes congestion and hemorrhage 

 coexist, in which case the color disappears for the 

 most part, revealing the presence of ecchymoses 

 in the pressure-whitened area. Less frequently 

 ecchymoses exist alone. Somewhat infrequently 

 skin ulcers appear on the throat and between the 

 forelegs, very rarely elsewhere on the body. 

 They are light brown, irregularly round or oval 

 in shape, %-2 centimeters in diameter, and cov- 

 ered with scabs. A rusty yellow, very sticky exu- 

 date, most apparent on the ventral scantily-haired 

 body surfaces, is noted in some individuals. 



Cough is observed in many field outbreaks, but 

 it is by no means a constant symptom in uncom- 

 plicated hog cholera. We have failed to establish 

 a definite relation between this symptom and the 

 petechial hemorrhages which appear in the laryn- 

 geal mucosa. Respiratory symptoms are not 

 prominent in hog cholera unless it is complicated 

 with pneumonia, but dyspnea develops frequently 

 under forced exertion. 



The superficial inguinal lymph glands are fre- 

 quently enlarged so as to attract attention, and 

 another common symptom is the collection of urine 

 in the sheath of the male pig, causing marked dis- 

 tention. When pressed out manually, the urine 



