MANGE OF POULTRY 



133 



other animals, is one of the best remedies for this scab. Others perhaps 

 as effectual are (1) creosote 1 part, lard 20 parts; (2) benzene 1 part, 

 ohve oil 10 parts; (3) carbolized vaseline (5%), or (4) an ointment of 

 carbolic acid 1 part, lard 20 parts. The stronger acaricides should not 

 be used upon young chicks. For these the ointment of Helmerich or 

 Balsam of Peru are quite suitable. The apphcation may be washed off 

 and repeated as necessary. I^tfi 



To prevent contagion and reinfection, diseased fowls should be re- 

 moved from the healthy and the quarters subjected to cleaning up and 

 disinfection, especial attention being given to roosts and other places 

 where the fowls are in the habit of perching. 



Fig. 74. — Cnemidocoptes mutans, male and female (after 

 Osborn, Bull. No. 5, Bureau of Entomology, U. S. Dept. of Agr.). 



Mange of the Body, or Depluming Mange. — The depluming mite, 

 Cnemidocoptes gallince, is closely related to the mite of foot mange and 

 it may easily be mistaken for the same species where the two forms of 

 mange coexist. The body form usually has its beginning on the back, 

 near the insertion of the tail-feathers. More rarely the head and upper 

 part of the neck are first attacked. From these regions it spreads to 

 adjacent parts of the body. 



The disease is accompanied by the production of an abundance of 

 epidermic scale§, irritation, and itching which impels the fowl to pluck 

 at the feathers. These easily drop out or are broken off, leaving a bald 

 or partly denuded skin which is but little thickened and remains normally 

 smooth and elastic. 



The acaricide treatment employed may be the same as for foot mange. 

 Where a number of birds are affected they may be treated by dipping 

 for several successive days in a sulphur bath. The same precautions 

 against contagion and reinfection are to be observed as for the leg form. 

 In this connection it is well to repeatedly disinfect the feet of roosters, 



