SCABIES IN DOGS AND HORSES. 51 



These embryos then commence and bore their way out of the 

 intestine into the tissues. Some make their way into the blood vessels and 

 are carried to different parts of the body. Only those, however, continue 

 to develop which reach the brain or spinal cord. The embryo now 

 commences to burrow along the surface of the brain, and in a few 

 days becomes stationary, forming a tiny vesicle or bladderworm. At 

 first this is about one eighth of an inch in diameter, but on the twenty- 

 fourth day it is the size of a pea. By the thirty-eighth day it is the 

 size of a cherry and the heads begin to grow, new heads appear, but 

 none reach their full development until the end of two, or three months. 



When such a brain is eaten by a dog the wall of the vesicle is 

 digested, but the heads remain uninjured and attach themselves to the 

 wall of the intestine and develop into adult tapexvorms. In about eight 

 or nine weeks the posterior segments of the worm become filled 

 with eggs, and breaking away from the rest they pass down the dog's 

 intestine. 



Generally speaking, lambs and yearlings are the animals attacked, 

 it being exceptional to find gid in animals over two years old. 



Those breeds which graze close are said to be more susceptible 

 than others. 



PREVENTION AND TREATMENT. 



Prevention of this disease is a simple matter, but there is no treat- 

 ment of any value once the animal is attacked. 



Dogs attending sheep, or on the farm, should be systematically 

 treated for tapeworms, and whilst such treatment is being carried out, 

 they should be kept tied up and all faeces collected and burned. 



The brain and spinal cord of all slaughtered sheep affected with 

 gid should first be well boiled before being fed to dogs, or they should 

 be burned. 



REPORT ON SCABIES (MANGE) IN DOGS AND HORSES 



An enquiry from a Midland County Council respecting Scabies in 

 horses and dogs was received in July last, and a full report furnished. 



As there seems to be much misconception concerning the different 

 kinds of Scabies in this country a brief account of these may be useful. 



The disease in Man, and various mammals, known as itch, mange, 

 scald, etc., and scientifically termed Scabies, is due to certain mites 

 belonging to two different families, hence the disease is spoken of as 

 Sarcoptinic Scabies and Demodecic Scabies, the former is the commoner 

 of the two. 



The Sarcopt or mite of the dog is known as Sarcoptes scabiei var. 

 canis, and that of the horse as S.scabiei var. equi. 



