TERMS 



921 



G. IMPERFECT CARRIAGE OF PARASITES. 



Parasites may develop up to a certain point in the alimentary 

 canal of insects in which they are unable to complete their life- 

 cycle — e.g., the malarial germ in many anophelines only proceeds 

 as far as the zygote. 



H. TERMS. 



Terms for Animal Parasites. 



Definitive host 

 Intermediate host 

 Intermediary host 

 Defi^nitive reservoir 

 Intermediate reservoir 

 Transmission 

 Infection 

 Contaminative 

 Inoculative . . 

 Ingestive 



Infected host . . 



Infected reservoir 

 Protective host 



Propagative host 



Transmission^ 

 Infection j 



Host with sexual life of 

 parasites. 



Host with asexual life of 

 parasites. 



No development of parasite. 

 Merely carriage. 



Natural supply of infection of 

 intermediate host. 



Natural supply of infection 

 for definitive host. 



Passage from intermediate to 

 definitive host. 



Passage from definitive to 

 intermediate host. 



Abrasions or bites contami- 

 nated by faeces, etc. 



Parasites injected by insect 

 during biting. 



Parasites taken into alimen- 

 tary canal per os. 



Terms for Bacteria. 



bac- 



Vertebrate infected by 



terium. 

 Vertebrate carrier. 

 Arthropod carrier without 



germ increasing in number. 

 Arthropod carrier with germ 



increasing in number. 



As in animal parasites. 



REFERENCES. 



Graham-Smith (19 1 4). Non- Blood-Sucking Flies. Cambridge. 

 HiNDLE {1914). Blood-Sucking Flies. Cambridge. 



Leiper (1915-1918). Jour. Royal Army Med. Corps (Transmission of 

 Bilharziosis) . 



MacGregor (191 7). Journal of Tropical Medicine and Hygiene, xx, 205 

 (Insect Vectors). London. 



