CUTAXEOUS AFFECTIONS OF PARASITIC ORIGIN 461 



On the external portions of the anal organs, on the skin of the 

 internal surface of the legs, and the mammary glands were a number 

 of pustules the size of hemp-seed, filled with thick yellowish pus Avhich 

 dried, leaving a brown scab, followed by a gradual succession of new 

 pustules at the periphery of the affected regions. There was also more or 

 less general disturbance and fever. These cases, as a rule, make a favor- 

 able termination. 



Canina Bubo. — Frohner describes a purulent follicular inflammation 

 of the lips, with lymphangitis and lymphadenitis on the head. This 

 he observed in young dogs. There was swelling of the skin on the face; 

 the lips became covered with bluish elevations which upon pressure 

 yielded a bloody purulent fluid. 



The Ij'mphatic glands of the larynx and the region of the larynx 

 and the parotids became tumefied, swelling to the size of a pigeon's egg. 

 One dog died of pyemia. Frick has seen a similar disease in an old dog, 

 which he does not think was a specific condition, but due to an extensive 

 eruption of acne pustules. 



Noma. — Moeller compares this with the noma (water cancer) of 

 children. It is a spontaneous gangrenous formation of the jaw, which 

 is extremely rare in the dog. The affection is situated in the corner of 

 the jaw. The gangrenous condition developed very rapidly, reaching 

 the size of a dollar in a very few days. The skin is grayish-brown in 

 color, exfoliates and can easily be lifted from the healthy tissue. The 

 submaxillary lymphatic glands were tumefied; there was also fever and 

 salivation. The condition finally healed, but only after the greater 

 portion of the jaw had been lost, the wound healing from the periphery. 

 The treatment consisted in the application of a thermo-cautery, followed 

 by corrosive sublimate solutions, 1 to 3000, and the animal was fed by 

 means of liquid nourishment, being unable, on account of the jaw, to pick 

 up the food and chew it. 



Cutaneous Affections Which are Caused by Animal Parasites. 



The changes produced in the skin from disease caused by animal 

 parasites are divided into two conditions — primary and secondary. 



The primary appears as a superficial inflammatory process, produced 

 directly by irritations of the parasites upon the skin, and this condition 

 depends to a large extent upon the amount of irritation and the depth 

 that the parasites have penetrated in the skin. 



The secondary symptoms are the result of this penetration into the 

 cutis, causing more or less itching and irritation, and, as a rule, scratching 

 and rubbing on the part of the animal, producing heat, redness, papules, 

 vesicles, pustules, hemorrhages, or excoriations. These irritated spots 



