2IO Veterinary Medicine. 



Ointments of phenol, naphthalin, creosote, lysol or creolin may 

 be substituted. For some time thereafter the limb is sensitive 

 and should be protected by vaseline, oil, or glycerine. 



SARCOPTIC SCABIES OF THE BODY OF CHICKEN OR 

 PIGEON. DEPLUMING SCABIES. 



5*. Laevis : No mammiform elevations on dorsum of female ; copulatory 

 suckers in male. Varieties : S. L. v. Gallince, and 5". L. v. Columboe, the 

 latter the smaller. Sym.ptofns : pecks out feathers from rump, thighs, back, 

 belly, breast and neck ; excess of epidermic scales, with acari, quills broken 

 at skin, debility, emaciation, laying falls off, flesh lacks flavor. Spreads 

 rapidly, especially through treading. Most active in spring and summer. 

 Treatment : Dry dust baths with phenol, sulphur, calcium sulphide, insect 

 powder, stavesacre, sulphur ointment, carbon bisulphide. Disinfect nests, 

 roosts, houses, runs, etc. 



This acariasis differs from that last described in attacking the 

 feathered portions of the body, and causing loss of feathers. 



It is caused by Sarcoptes Laevis which is somewhat smaller 

 than the Sarcoptes mutans and further differs in the absence of the 

 mammiform projections on the back of the female, and in the 

 presence of two copulatory suckers on the posterior part of the 

 ventral aspect in the male. Two varieties differing slightly in 

 size are found on hen and pigeon respectively. 



Sarcoptes Laevis var. Gallinae. Ovigerous female is .31 to 

 .35 mm. and the male .17 to .18 mm. long. Discovered in 1886 

 on a chicken (Railliet). 



Sarcoptes Laevis var. Columbae. Ovigerous female .27 to 

 .31 nmi. and the male .14 to .17 mm. long. Discovered in 1855 

 on a me.s.senger pigeon (Railliet and Cadiot). 



Symptoms. The bird is noticed to pick out its feathers more 

 especially around the rump, then the thighs, back, belly, breast 

 and neck, and it is not uncommon to find one performing this 

 service for another. Examination of the parts shows an excessive 

 production of epidermic scales, especially around the points of in- 

 sertion of the quills, and in this debris a number of the actively 

 moving acari. The quills are often found to be broken off at the 

 level of the skin, and the remaining part crumbling into powder. 

 Masses of powder with acari are also found at the junction of the 



