204 VETERINARY STATE BOARD 



sites of the horse, causing pruritus, scratching, rubbing and a rough 

 coat. 



Treatment : Wash with a 2 per cent, solution of ereolin, or dis- 

 solve four ounces of staphisagria in one gallon of boiling water and 

 use as a wash when cool. Clean the stable thoroughly and use a 

 whitewash containing carbolic acid. 



What are the causes, dietetic, climatic, chemical and traumatic, of 

 erythema? Give prevention and treatment of each form 

 of erythema. 

 Primary erythema is due to external irritants, blows, bites, scald- 

 ing, burning, sun's rays, vesicants such as mustard, cantharides, 

 acids, lye, insect stings, etc. 



Secondary erythema is due to infectious diseases, as swine plague 

 and hog cholera, dog distemper, foot and mouth disease ; also follows 

 the ingestion of certain foods as buckwheat, clover and distillers' 

 grains. 



Prevention depends upon the avoidance of the above enumerated 

 causes. Treatment: Cold, astringent applications such as Burrow's 

 lotion, Goulard's extract, etc. Give a laxative diet. 



Mention one of the parasites that causes mange in the dog. 



Demodex foUiculorum causes demodectic or follicular mange, 

 which is practically incurable. 



What animals and what regions of the body harbor demodex foUicu- 

 lorum? Give symptoms and treatment. 



The dog and pig. The breast, legs, axillary and facial regions 

 are usually first affected, later the entire surface of the body and 

 legs may be involved. 



Symptoms: The skin becomes red and thickened; loss of the 

 hair ; extreme pruritus ; pustules give the skin a papillated appear- 

 ance. 



Treatment : Unsuccessful ; a mixture of gasoline, oil of tar and 

 oil of cade has given more or less satisfaction; sulphur and lye is 

 used by some, but the great majority of cases show no improvement 

 and gradually grow worse, become emaciated and die. Some few 

 improve and seem to be cured, only to have the disease break out 

 anew. 



Mention the parasites causing scabies in sheep. State the habits of 

 these parasites. 



Sarcoptes scabei, rare. 



Psoroptes communis, common scab parasite of sheep. 



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