Test 4: Intro Parasitology Flashcards
(50 cards)
What are the six major divisions Parasites are classified into?
- Protozoa
- Nematoda (Roundworm)
- Platyhelminthes (Flatworms)
- Pentastomids (Tongue Worm)
- Acanthocephala (Thorny-headed worms)
- Arthropoda
What other parasite are included in the Platyhelminthes division?
- Cestoda (tapeworms)
- Trematoda (Flukes)
Define: Symbiosis
Two organisms of different species living together
Define: Commensalism
Symbiotic relationship in which the parasite is benefited and host is neither benefited nor harmed
Define: Mutualism
Symbiotic relationship in which both parasite and host are benefited
What is defined by: Symbiotic relationship in which one organism, the parasite, is metabolically dependent on another organism, the host; the host may or may not be harmed in the relationship?
Parasitism
Define: Pathogenic Parasite
Parasite that harms the host
Define: Facultative Parasite
Normally free living organism but may become an opportunistic parasite
Define: Obilgatory Parasite
Cannot survive in a free living state
Define: Endopatasite:
A parasite living inside the host
Define: Ectoparasite
A parasite living on the external surface of the host
What is defined by: Any living organism, animal or plant that harbors or nourishes another organism.
Host
What is defined by: The host that harbors the adult or sexually reproducing stages of a parasite.
Definitive Host
What is defined by: That host which harbors the immature, larval, or asexually reproducing forms of a parasite.
Intermediate Host
What is defined by: A host which replaces man in the life cycle of the parasite.
Reservoir Host
What is defined by: A host that serves as a transport host in which the parasitic forms undergo no development, but passes on to the final host.
Paratenic Host
Define: Life Cycle
Process of a parasite’s growth, development and reproduction, which proceeds in one or more different host depending on the species of parasites
Define: Infective Stage
A stage when a parasite can invade a human body and live in it
Define: Infective Route
The entrance which the parasite invades the human body
Define: Infective Mode
How the parasite invades the human body
What is defined by: A Carrier, usually an arthropod, which transmits an infective form of the parasite from host to another?
Vector
What is defined by: A reinfection in which the host is its own source of infection from a source already present in the body?
Autoinfection
What route of infection pertains to taking in orally in food, water, or aerosols, etc.., remain in GI tract, Internal migration to other organs, Migration through other host systems and return to GI sites?
Ingestion
This route of infection is through host tissues, skin or mucous membranes, and remains on or within epidermis or subcutaneous tissues, and/or penetrates to other host organs or tissues?
Active Penetration
