*HB SKm. 237 



branching filaments of the fungus stand out prominently in the sub- 

 stance of both, dark and unchanged. The eruption usually appears on 

 the back, loins, croup, chest, and head. It tends to spontaneous recov- 

 ery in a month or two, leaving for a time a dappled coat from the spots 

 of short, light-colored hair of the new growth. 



The most effective way of reaching the parasite in the hair follicles is 

 to extract the hair individually, but in the horse the mere shaving of 

 the affected part is usually enough. It may then be painted with tinct- 

 ure of iodine twice a day for two weeks. Germs about the stable may 

 be covered up or destroyed by a whitewash of freshly burned quicklime, 

 the harness, brushes, etc. , may be washed with caustic soda, and then 

 smeared with a solution of corrosive sublimate, one-half dram and water 

 one pint. The clothing may be boiled and dried. 



Matting of the Mane and Tail. This is known as Plica Po- 

 lornica, and the parasite is Tricophyton Sporuloides. In this malady 

 the mane and tail of the horse as well as the hair of men, is associated 

 with numerous spores of a tricophyton, and is rationally treated by cut- 

 ting off the hair and applying tincture of iodine or a solution of corro- 

 sive sublimate four parts to one thousand parts of water. 



Favus or Honeycomb Ring-worm. It is caused by a para- 

 site called Achorion Schonleini. Mengin and Goyau who describe this 

 in the horse, say that it loses its characteristic honeycomb or cup-shaped 

 appearance, and forms onl}' a series of closely aggregated, dry, yellow- 

 ish crusts the size of hemp seed on the trunk, shoulders, flanks, or 

 thighs. They are accompanied by severe itching, especially at night. 

 The cryptogam, formed of spherical cells with a few filaments only, 

 grows in the hair follicles and on the cuticle, and th is a crust often 

 forms around the root of a hair. I,ike the other cryptograms, their 

 color, as seen under the microscope, is unaffected by acetic acid, alcohol, 

 ether, or oil of turpentine, while the cells are turned bluish by iodine. 

 For treatment, remove the hair and apply tincture of iodine or corrosive 

 sublimate lotion, as advised under "Matting of the Mane and Tail." 



Parasitic Pityriasis. This is caused by the parasite Microsporon 

 Furfur. It attacks the horse's head where the harness presses, and 

 leads to dropping of the hair, leaving bald patches covered with a bran- 

 like scruf, without any eruption, heat, tenderness, swelling, or rigidity 

 of the skin. A lotion of carbolic acid, one dram; and water, two and 

 one-half ounces, is usually applied to effect a cure. 



