THE TAPE -WORM. 



41 



there are upward of 



from ten to thirty feet in length; 

 eight hundred joints in a worm 

 ten feet long. The head ends 

 in a proboscis armed with a 

 double crown of hooks; the 

 first proglottis or sexually ma- 

 ture segment begins at the 

 450th. While in some persons 

 the presence of a tape-worm is 

 simply an annoyance, in ner- 

 vous and irritable persons it 

 causes restlessness, undue anx- 

 iety, and various dyspeptic 

 symptoms. Among the pre- 

 yentive remedies against tape- 

 worms is the disuse of raw or 

 underdone pork, and "measly" 

 pork — i.e., the flesh of swine 

 containing the little bladder- 

 like vesicles. Cysticerci, or 

 young tape - worms, can be 

 readily distinguished, but when 

 thoroughly cooked are harm- 

 less, as the temperature of 

 boiling water is sufficient to 

 kill them. As a matter of 

 course, in the use of drugs to 

 expel a tape-worm they should 

 be pushed so as to carry off the 

 entire animal, as new segments 

 grow out from near the head 

 as rapidly as the joints are de- 

 tached. 



The history of the human 



tape-worm, Tw}lia solium {¥\g- Wm. H.— Tannin solmm. Natural size, 

 ..^ . J! ^^ m\ with the head magnified. Strobila 



41), IS as follows: The eggs stage. 



