. Animal parasites and parasitic diseases. Domestic animals; Veterinary medicine. 170 Taenia Canina (Canis—dog). Synonym.—Taenia Cucumerina. Distribtition.—The most common tapeworm found in the middle West; found in European countries. Description.—The head is suc- ceeded by a narrow, short neck; it is provided with a club-shaped protractile proboscis which is lo- cated in the center of the head between four sucker discs; this proboscis is provided with four rows of small hooklets which point backward; by means of this pro- boscis and the sucker discs it is enabled to hold firml
. Animal parasites and parasitic diseases. Domestic animals; Veterinary medicine. 170 Taenia Canina (Canis—dog). Synonym.—Taenia Cucumerina. Distribtition.—The most common tapeworm found in the middle West; found in European countries. Description.—The head is suc- ceeded by a narrow, short neck; it is provided with a club-shaped protractile proboscis which is lo- cated in the center of the head between four sucker discs; this proboscis is provided with four rows of small hooklets which point backward; by means of this pro- boscis and the sucker discs it is enabled to hold firmly to the mu- cous membrane of the small intes- tines of its host. The terminal segments are about one-sixteenth of an inch in width and one half inch long; each seg- ment is provided with two genital pores, one located in the middle of each lateral side. The adult worm measures from five to twelve inches. Life History.—The intermediate host of the Taenia Canina is the biting louse (Trichodectes Latus) and the flea (Pulex Serraticeps). These insect parasites become infested while procuring food which is con- taminated ; the minute embryo is liberated in the di- gestive tract, migrates to the abdominal cavity and there forms a cyst known as the cryptocystis tricho= dectis (if formed in the louse) or cryptocystis pulecidae (if formed in the flea). The dog, by biting itself to relieve the irritation caused by these insects, gets them in its mouth ; thus the larva, which consists Fig. G8- Taenia Canina. a, Head. c, Genital pore. d, Ripe segments. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kaupp, Benjamin Franklyn, 1874- [from old catalog]. Chicago, A. Eger
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