60 



PARASITES OF MAN 



identical. It was easy to find and pick out the measles in their 

 cysts from the naturally friable liver. I also detected four 

 Cysticerci in the lungs, two of which had degenerated. Micro- 

 scopic examination confirmed my interpretation of the naked-eye 

 appearances. 



FIG. 22. Section of the heart of a calf infested by cestode lame. After Mosler. 



Fragmentary as the above data are, they serve to show that 

 we have hitherto been too hasty in concluding that beef and veal 

 measles reside only in the voluntary and striated muscles of 

 their hosts. The facts here recorded prove that the liver of a calf 

 may be extensively invaded by cysticerci, and yet the animal will 

 exhibit no sign of constitutional disturbance. The cestode 

 tuberculosis may come and go without any diagnostic symptom, 

 whilst a few months suffice for the natural death and decay of 

 the parasite by calcareous degeneration. Thus it becomes 

 extremely probable that many experiments hitherto regarded 

 as negative in their results have really been positive ; the 

 pathological evidences having been either misinterpreted or 



