Oct. 10,1913 
Cysticercus Ovis 
23 
June 11. Tapeworm eggs and eggs of Toxascaris were found in feces. 
June 19. Two or three segments found in feces. 
July 24. Chloroformed. No tapeworms found. Numerous d*ead fly larvae in colon 
and small intestine. Numerous Toxascaris in upper part of jejunum and in duo¬ 
denum. 
Dog No. 6.—A medium-sized white male. Fed muscle cysticerci from sheep. 
March 29. Received one-half ounce of castor oil at 5 p. m. March 30. Feces were 
examined and Toxascaris eggs found. 
April 23. Fed 20 cysts from muscles of sheep. Hooks well developed. 
April 24. Fed 1 cyst from myocardium. 
May 2. Fed 1 cyst from myocardium. 
May 15. Fed 1 cyst from myocardium. 
May 21. Fed 1 cyst from myocardium. 
May 24. Fed 2 cysts from muscles of sheep. 
Total.. 26 cysts. 
June 11. Tapeworm eggs and eggs of Toxascaris were found in feces. 
June 19. Two tapeworm segments were found in feces. 
July 26. Chloroformed. Eight or nine tapeworms with gravid segments, one of them 
measuring 1 meter in length. Heads attached 135 cm. above the ileocecal valve, and 
posterior ends of the worms extending to a distance of 55 cm. from the ileocecal valve. 
Numerous individuals of Toxascaris in jejunum and in duodenum. 
Dog No. 7.—A medium-sized black-and-white spotted female. Fed Cysticercus 
tenuicollis from peritoneum of sheep. Feces were not examined before feeding cysts. 
April 9. Fed 4 Cysticercus tenuicollis 
April 18. Fed 7 Cysticercus tenuicollis . 
May 28. Fed 7 Cysticercus tenuicollis. 
Total.. 18. 
June 22. Feces show a few young tapeworm segments. 
July 11. Found several portions of tapeworms; each portion contained from 2 to 20 
segments. 
July 26, Chloroformed. Three or four individuals of Toxascaris in duodenum and 
jejunum. Ten tapeworms with short strobila not over 10 mm. long in duodenum. 
In continuation of the experiment with the dogs another experiment 
was undertaken for the purpose of recovering the cystic stages of the 
tapeworms. Ten lambs were purchased from a lot of thirty-nine, the 
remainder of which were slaughtered at one of the packing houses in 
Chicago and found to be free on post-mortem examination from both 
muscle cysticerci and Cysticercus tenuicollis. One of the ten died shortly 
after purchase and consequently was not used in the experiment. The 
# sheep were kept during the experiment in floored and covered pens in 
one of the sheep barns at the Union Stock Yards, Chicago, and were fed 
dry hay and occasionally oats and received water piped from the water 
mains. The identity of the various lambs was maintained by numbered 
ear tags. 
Lamb No. 1.—July 24. One half of a gravid segment from a tapeworm out of dog No. 
1 (a dog which had been fed muscle cysts) was cut in pieces and given in a drench with 
water. 
August 7. Dr. Day reported that lambs Nos. 1,2,3, an d 5 were more or less sick but 
would probably recover. 
