13 
Dipylidium and Davainea. 
8. Eggs spherical, 43 to 50 p; 8 to 20 eggs in each egg capsule; accidental in 
man, chiefly in children Dipylidium caninum (p. 50) 
Eggs with 2 shells, the outer with 2 mammillate projections; onchosphere ( embryo ) 
8 u; 1 to 3 eggs in each egg-ball, with calcareous corpuscles; tropical and 
subtropiced Davainea madagascariensis (p. 63) 
Mature eggs not yet observed, but, probably about 38.6 by 36.4 p; egg-balls without 
calcareous corpuscles; Asiatic D. asiatica (p. 65) 
DIBOTHRIOCEPHALIDyE. 
9. Eggs 68 to 71 by 45 to 50 ju; chiefly Old-World form, occasionally in Amer- 
ica; the broad tapeworm Dibothriocephalus latus (p. 15) 
Eggs 75 to 80 by 50 p; Greenland D. cordatus (p. 19) 
Eggs brownish, 63 by 48 to 50 p; Asiatic Diplogonoporus grandis (p. 22) 
SYMPTOMS. 
The symptomatology of intestinal tseniasis is indefinite. There may 
be giddiness, humming in the ears, disorders of vision, nasal and anal 
pruritus, salivation, disorders of appetite and digestion, colic, pains in 
epigastrium and other regions of abdomen, cardiac palpitation, syncope, 
pains and lassitude in limbs, emaciation, anemia, etc. 
, TREATMENT. 
In treatment it should be recalled that (a) the clearer the bowels are 
the better are the chances for success, (/>) the older the drug is the less 
are the chances for success, and (c) the nervous system of the tapeworm 
is well developed, hence the parasites are susceptible to a sudden 
change in temperature. 
(a) Preparation of patient . — Clear out the bowels, so that the drug- 
can reach the parasite and so that the latter will not meet with obstruc- 
tions while descending to the anus. The diet should be light, avoiding 
vegetables and any foods which tend to the production of large quantities 
of feces. 
(b) Anthelmintic . — Doubtless many failures in treatment are due 
to using old drugs which have lost their anthelmintic properties. 
(c) Passage of the worm . — The patient should be instructed to pass 
the worm into a vessel containing warm water. Under no circum- 
stances should he pass the worm into a water-closet, as the parasite, 
upon coming in contact with a cold object, may contract and break. 
Prevention. — The method of prevention varies according to the 
different species. As all intestinal tapeworms are contracted per os, 
prevention involves a care of the food eaten. All tapeworm segments 
and stools should be burned, unless used for scientific study. See also 
under the different species. 
