248 Local Injuries. 



known as Achorion Schonleinii or Tricophyton favosa^ is 

 a parasitic fungus of peculiar form and growth. It has 

 a special preference for the hairs. Having entered the 

 hair follicle it throws out a mass of fungoid cells around 

 the base, and growing, encircles the hair in such a 

 manner that the latter appears to be growing out of a 

 cup. A number of these may unite, and thus a large 

 and unsightly tumour is formed, with the loss of sur- 

 rounding tissue by resulting absorption. It is supposed 

 the dog catches the complaint from mice, in which it is 

 quite common. The tumour is usually located about 

 the head. It is also peculiar as emitting a smell not 

 unlike the urine of the cat, probably derived from the 

 course of destruction of animal tissue. 



T?'^^/;/^*?;// consists of entire removal of all the diseased 

 hairs and fungus crusts by means of a paper knife or 

 suitable instrument, and immediately burned. The bare 

 fifigers vmst not come into contact with the diseased mass. 

 Appropriate dressings will be found in the list enumerated 

 for Tinea tonsurans. The most effective are solution of 

 corrosive sublimate (poison) and the nitrate of silver 

 ointment. 



CHAPTER XIX. 

 LOCAL INJURIES. 



Anchylosis, or Stiff-joint— Sprain of Muscle and Sinew— Congenital Deformity 

 — Dislocations — Fracture of Bone — False Joint — Lameness — Sprain of 

 Muscle— Sprain of Tendon — Lameness of the Feet — Carpet Fever— In- 

 juries by Thorns, Nail>, &c. — Raw, Bruised and Bleeding Feet — Mange of 

 the Foot— Overgrown Claws— Wounds— Haemorrhage, or Bleeding. 



Anchylosis, or Stiff-Joint^ is not uncommon in canine 

 animals, being due to some injury and consequent in- 

 flammation, with the formation of exostosis, or bony 

 deposit. The latter accumulates largely at the ends of 

 the bones, eventually uniting them, causing the animal 



