Flashcards in Basic Terminology Deck (17):
The study of parasites.
Organisms that live on (ectoparasite) or in (endoparasite) an animal, deriving their nutrition and protection at the expense of the animal. They are primarily programed to reproduce.
Require a host. Can survive outside the host only for a short time.
Can live on or off the host.
The animal supporting the parasite.
Harbors the a_D_ult form of the parasite (primary host).
Harbors the _I_mmature form of the parasite. Development takes place within the intermediate host (secondary host).
May harbor adult or immature form. No development takes place on this host; it is not the normal host (transport host).
Not harmful to the host, may be "normal" fauna of the inhabited host system.
-ex: Skin mites in certain species. Bacteria found in rumen/cecum which help in fermentation.
The parasite is obligated or it is necessary for the parasite to live on the host (or during that stage of development). This form will not be found free living (for extended periods).
Live on or parasitize superficial structures or skin of the host. This is usually the adult form.
Live in or parasitize an internal site or organ system. Usually identified by examining feces to detect the ova of the organism.
-ex: intestinal parasites
An internal inhabitation by a parasite, also any parasitic organism.
ex: bacteria, fungal agents
An external inhabitation by a parasite.
A parasite which utilizes 1 host species. Host specific.
-ex: Lice are species specific. Cat lice only infest cats.
Utilizes more than 2 hosts during normal development (life cycle). Must us an intermediate host.
-ex: dipylidium [flea tapeworm] primary/definitive host is cat or dog, intermediate host is the flea.