236 



THE DISEASES OF THE DOG. 



identical in species, for Gruby has transferred the disease 

 from man to the dog and vice versa. However, the 

 specific identity has not yet been established. The obsti- 

 nacy of this disease is accounted for by the remote posi- 

 tion of the parasites and their inaccessibility, because of 



Pia. 72.- 



-Acari folliculorum around the hair, in ite follicle also in the 

 sebaceous cuU-de-sac (Getjbt). * 100. 



the depth of the follicles and the sebaceous nature of their 

 contents. It has been noted as of diagnostic value that 

 in the follicular disease the body smells most offensively, 

 aud that the dog thus affected shakes rather than scratches 



