VARIOUS OTHER PARASITES OF THE SKIN, 



591 



never observed any symptoms of poisoning. In the dog, we may 

 apply a small quantity of ointment under the collar (as much as 

 the size of a pea or acorn) ; good results are also obtained with 

 lotions of sublimate at 1 per cent., using it upon small surfaces at 

 a time, and carefully drying the skin after each lotion. 2. Persian 

 insect powder spread between the hair. It is generally too weak 

 for large animals. 3. Decoctions of tobacco (4 to 5 per cent.). 

 They are very advisable for the sheep and dog ; they are less adapted 

 for the horse and ox. 



Some practitioners use tobacco lye which is known under the 

 name of nicotinaÇsee page 566). We may also try lotions of cresol 

 water (2J per cent.), a decoction of staphisagria seed in vinegar 

 (1 : 20), a mixture of powdered cevadilla and staphisagria, white 

 hellebore (of each 1 part) and anise powder (2 parts) ; benzol asso- 

 ciated with green soap, alcohol or oil (DInter); carbolic acid in a 

 solution of 5 per cent., essence of anise (mixed with ordinary oil, 

 1:10) for pet dogs. Washing with arsenical preparations (arsenous 

 acid, potash, of each 15 grammes, water and vinegar of each 1 J 

 kilo, recommended by Yiborg, later by Schleg, are very efficient, 

 especially for animals of our large species ; but this remedy requires 

 caution. A decoction of nux vomica, advised by Eck, is very 

 dangerous and must not be used. Concerning fetid animal oil, 

 which is commended by Menkert, it may be replaced with advantage 

 by cresol. Thierry combats trichodectes of the sheep with a mixture 

 of cevadilla seed powder and Persian powder. The eggs of these 

 parasites are rapidly destroyed by vinegar, which dissolves their 

 shell. 



VARIOUS OTHER PARASITES OP THE SKIN. 



1. Fleas are seen on the dog (Pulix canis) and the cat {Pulex felis) 

 — they suck the blood, cause itching, and produce cutaneous erup- 

 tions; their excrements soil the skin, and often accumulate on the 

 base of the hair in thick layers, somewhat similar to coffee-grounds. 

 The most advisable therapeutic agent is Persian insect powder ; it 

 is applied upon the skin after having slightly moistened it. It is 

 proper to remove animals which are thus treated in order to pre- 

 vent the return upon the integment of the expelled parasites after 

 they have remained in the stables for some time. Baths of cresol 

 water (2 per cent.) and washing with this preparation are also very 

 favorable. 



