PARASITES 



169 



of the greatest service is thymol given in large 

 doses and followed up by a saline laxative. Oil of 

 male fern is also very effectual. This latter should 

 be given only after the patient has been fasted for 

 twenty-four hours, having previously ^received a 

 purgative. Six to eight hours after the exhibition 

 of the male fern a saline purgative should be given 

 to clean the intestinal canal. The strength of the 

 patient must be carefully maintained by nutritious 

 and easily digested foods — milk, and raw meat — 

 with tonics of iron and a bitter tonic such as quas- 

 sia or gentian. 



Tricocephalus Depressiusculus 



A white worm forty-five to seventy-five milli- 

 meters long. This parasite inhabits the cecum of 

 the dog and is often found in conjunction with the 

 Ankylostomum trigonocephalum. It produces anemia 

 and often typhlitis — appendicitis. 



Treatment. — The same as for Ankylostomum trig- 

 onacephalum. 



Taenia — Tapeworms 



The tapeworms most commonly met with in the 

 dog are merely mentioned here and the reader is 

 again referred to works on parasitology for a more 

 extended description. The foliuwmg table gives the 

 name, the intermediate host, and the larval form: 



Name 



Intermediate 

 Host 



Larval Form 



Taenia Serrata... 



Taenia Serialis. ... 

 Taenia Marginata. 



Taenia Coenurus. . 

 T. Echinococcus . 



Taenia Canis. . . .. 

 Taenia Krabbei. . . 



50 cm. to 2 m. . . 



45 cm. to 75 cm. 

 1.5m. to 2 m.. . . 



50 cm. to 75 cm. 

 4 mm. to 5 mm.. 



ID cm. to 40 cm. 

 I m 



Hare and rabbit. 



Rodents . . 

 Ruminants 



Sheep 



Man, swine, rumi- 

 nants 



Louse and flea. . . 

 Reindeer 



Cysticercus pisi- 



formis 

 Coenurus serialis 

 Cy sticerc us tenui- 



colHs 

 Coenurus cerebralis 



Ecliinococcus poly- 

 morphous 



Cryptocystus trich- - 

 odectis 



Crj^ptocystus serra- 

 ticeps 



