No. 387.] PARASITE WORMS IN MAN AND ANIMALS. 249 
water in which the parasites had been washed had no effect on 
the dogs. a 
The Tenia ecchinococcus, a tapeworm which in one form of 
its parasitic life gives rise to the condition called “Hydatid cyst,” 
also gives off a poison, for the fluid taken from the cyst has 
been shown to be toxic by Debove and Humphrey, who experi- 
mented on men and animals. This explains the severe symp- 
toms and even death which may follow the puncture of a cyst 
by the surgeon, or its spontaneous rupture. There is also 
reason to believe that the Trichina and other parasitic worms 
give off poisons. At any rate, we have a fruitful field of inves- 
tigation open to research along these lines, and there may be a 
good deal in the home remedy of the baker worm-specialist ! 
HYGIENIC INSTITUTE UNIVERSITY OF BERLIN. 
