PREVENTION, SYMPTOMS AND TREATMENT 93 



The eversion of the lid should occur within a few minutes. Among 

 the operations for marked entropion the simplest is removal of an 

 elliptical piece of skin from the lid and closing the wound by means 

 of fine silk. It is well to also remove some of the underlying muscle. 



Favus — Honeycomb Ringworm — Scall. 



Favus is a disease of the skin caused by the fungus Achorion 

 schoenleinii or Tinea favosa, which is almost identical with Tinea 

 tonsurans of ringworm. It attacks more often the young of cats 

 and dogs, man, horses and cattle, fowl, rabbits and mice. The head, 

 belly, inner side of the thighs and extremities are the more common 

 seats of the disease. It is characterized by the appearance of dis- 

 crete or confluent, sulphur-yellow, cupped, circular crusts, and 

 sometimes of gray, mortar-like crusts, with loss of hair and the 

 development of a peculiar odor. In fowl the disease begins on the 

 comb as white spots like mould, spreads to form a general crust on 

 the comb, and thence over the body with crusts and loss of feathers. 

 The disease is communicable from animals to man and from one spe- 

 cies of animal to another, save in the case of the fowl fungus. In 

 the cup-like depressions in the centre of the crusts may be found an 

 almost pure culture of the mycelium and spores of the fungus. 



Treatment. — The crusts mu9t be removed by soaking with oil, 

 or a mixture of soft soap and lard, and by washing with soap and 

 water. The same parasiticides are used as for ringworm. Sulphur 

 ointment is good, or ointments of naphthol, resorcin, thymol, tar, 

 creolin, etc., in strength of 5 to 10 per cent. Salicylic acid in sweet 

 oil (5 per cent.) or sulphur ointment are among the least toxic. 

 Painting with tincture of iodine, and pure iodine crystals (1-8) with 

 goose grease are also effective. 



Fleas (Pulex Irritans, var. Canis efc Felis). 



These commonly attack the dog and cat. Frequent washing 

 and grooming and clean bedding often changed, as of shavings or 



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