CESTODE INFECTIONS 



895 



Cestode Infections. 

 {These are on the same lines as the trematode infections.) 



Cestode. 



Defini- 

 tive 

 Host. 



Defini- 

 tive 



Reser- 

 voir. 



Infection. 



Intermediate. 

 Hosts. 



Transmission. 



Dibothrio- 

 cephalus 

 latus. 



Man. 



Dogs, 

 cats. 



Eggs in 

 water. 



Cyclops, 

 fish. 



Plerocercoid 

 in muscles. 



Ingestive. 



Dipylidium 

 caninum. 



Man. 



Dogs, 

 cats. 



Eggs on 

 fur. 



Dog and cat, 

 louse or flea. 



Dog licking 

 cysticerci. 

 Cat milk 

 cysticerci. 



Ingestive. 



Hymenolepis 

 diminuta. 



Man. 



Rats, 

 mice. 



Eggs on 

 fur. 



Meal broth 

 beetles, 

 rat flea. 



Food cysticerci. 

 Ingestive. 



Teenia 

 solium. 



Man. 



Man, 



Eggs in 

 faeces. 



Pigs. 



Cysticerci in 

 muscles. 



Ingestive. 



TcBnia 

 saginata. 



Man. 



Man. 



Eggs in 

 faeces. 



Cattle. 



Cysticerci in 

 muscles. 



Ingestive. 



Echinococcus . 



Dog. 

 jackal. 



Dog. 

 jackal. 



Eggs on 

 fur. 



Man, sheep. 



Cysticerci in 

 muscles. 



Ingestive. 



C. MYIASIS. 



Myiasis comprises the infestation of the vertebrate body with 

 the larva of diptera, and the disorders which arise in the body of the 

 host therefrom. 



The vertebrate is an intermediate host, because not merely is it 

 protective to the fly larva, but in it the larva grows and develops 

 until it is about to pupate. 



There is no doubt that this is an advantage to the fly, and that 

 this method of protection is in process of evolution. In Chapter 

 XXXIII. we have written upon the change in habits of flies, and will 

 merely remind the reader that there is ample evidence that within 

 quite recent years a scatophilous fly has so changed its habits that 



