TAPE-WORMS. 149 



would be again taken in so quickly in such quantities, 

 especially where the grazlng-ground of the birds is 

 changed. 



A little Insight into how man contracts this disease, 

 and how it Is treated in human practice, will help the 

 farmer to an Intellio-ent treatment of his birds. The 

 two common kinds found In man are the " Toenia 

 Solium," so called from its being found singly In its 

 host, and the ^' Taenia Medlacanelleta." The former is 

 contracted from eating diseased pork, commonly called 

 '^ measly pork ; '' the latter from diseased beef, or — very 

 rarely — mutton. The pig contracts the disease by 

 swallowing a tape-worm when scavenging, or when fed 

 on offal; the ox, either when grazing or drinking. 

 The worm having thus got into the entrails of its host, 

 burrows out and into the flesh, where It takes an 

 hydatid form and lays Its eggs, which are carried by 

 circulation all over the body, remaining the thickest 

 under the shoulder-blade, In the lower jaw, and under 

 the root of the tono-ue, and formino; the familiar 

 appearance known as measly. This flesh is then eaten, 

 some parts of It not having been sufficiently cooked 

 through to destroy the vitality of the eggs ; and if 

 swallowed by one whose digestive powers are favourable, 

 the egg hatches, and the worm Is developed, some per- 

 sons being more susceptible to the disease than others. 



