290 



DISEASES OF THE LIVER. 



Fig. 134.— Thin - necked 

 bladder - worm (Cysti- 

 cercus tenuicollis), with 

 head extruded from 

 body, from cavity of 

 a steer, natural size. 

 (Stiles, Annual Keport, 

 U.S.A. Bureau of Agri- 

 culture, 1901.) 



chiefly by a process of exclusion, though the signs 

 furnished by percussion of the right flank, and by 

 examination of the blood, 

 are of some assistance. 



Prognosis. The prog- 

 nosis is extremely grave. 

 Treatment is of little 

 value. Even supposing 

 that the diagnosis has been 

 exact, surgical intervention 

 is out of the question, and 

 only this would appear 

 theoretically to offer a 

 chance of success. The 

 abscesses are multiple, 

 deeply placed, separated 

 from one another, and 

 sometimes surrounded by 

 enormous tracts of in- 

 flamed tissue. In fact, the condition is of such a 

 character as entirely to prohibit active measures. 



CYSTICERCOSIS. 



This disease is produced by the thin- or long- 

 necked bladder-worm {Cysticercus tenuicollis) found 

 in cattle, sheep, and swine. 

 The cysticercus represents 

 an intermediate stage of de- 

 velopment of the marginate 

 tapeworm {Tania margi- 

 nata) of dogs and wolves. 

 It is by no means un- 

 common in Europe and 

 America, and occurs in the 

 body cavity of cattle, sheep, 

 swine, and other animals, 

 attached to the diaphragm, 

 omentum, liver, or other 

 organ. 



When eaten by dogs or 

 wolves, it develops into the 

 marginate tapeworm, which was formerly confused 

 with T. solium of man, and gave rise to the 



Fig. 136.— Head of the 

 marginate tapeworm 

 (Tcania marginata). 

 X 17. (Stiles, Annual 

 Eeport, U.S.A. Bureau 

 of Agriculture, 1901.) 



^ 



Fig. 135. — The marginate 

 tapeworm (Tcenia mar- 

 ginata), natural size. 

 (Stiles, Annual Keport, 

 U.S.A. Bureau of Agri- 

 culture, 1901.) 



