Parasitology Ch. 1
1. Define Parasitology: The study of parasitic relationships
2. What does veterinary parasitology study?: The study of parasitic relationships affecting do-
mesticated, wild, and laboratory animals, and to some extent those parasites that have the potential to be transmitted
directly from animals to humans.
3. Define Symbiosis: This describes any association (either temporary or permanent) between at least 2 living
organisms (ex: dogs and cats)
4. What are the five types of symbiotic relationships?: Predator-Prey, Phoresis, Mutualism,
commensalism, parasitism
5. Which relationship is extremely short?: Predator-Prey relationship
6. In a predator-prey relationship how many symbionts benefit?: Only one symbiont
benefits at the expense of the other.
7. Give an example of a Predator-Prey relationship.: A lion (predator) killing a zebra (prey)
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, 8. Define phoresies.: In this relationship, the smaller member is carried by the larger member
9. Example of Phoresies.: The bacteria, Moraxella bovis (pink eye), is mechanically carried from the eyes of
one cow to those of another on the sticky foot pads of the face fly. The bacteria is the smaller member and the fly is the
larger member.
10. Define mutualism.: This type of relationship describes an association in which both organisms will benefit
from the relationship
11. Example of mutualism.: The rumen environment of a cow. The cow provides the microbes a place to
live, and in return, they aid in cellulose digestion for the cow.
12. Define commensalism.: This describes a relationship where one organism benefits, and the other
neither benefits or is harmed.
13. Example of commensalism: The shark and remora. The remora is a hitchhiker that attaches to the
shark, and it removes leftover food from the shark after a meal. The shark does not benefit from this, but it does not
harm it.
14. Define parasitism.: This relationship exists between two organisms of different species
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1. Define Parasitology: The study of parasitic relationships
2. What does veterinary parasitology study?: The study of parasitic relationships affecting do-
mesticated, wild, and laboratory animals, and to some extent those parasites that have the potential to be transmitted
directly from animals to humans.
3. Define Symbiosis: This describes any association (either temporary or permanent) between at least 2 living
organisms (ex: dogs and cats)
4. What are the five types of symbiotic relationships?: Predator-Prey, Phoresis, Mutualism,
commensalism, parasitism
5. Which relationship is extremely short?: Predator-Prey relationship
6. In a predator-prey relationship how many symbionts benefit?: Only one symbiont
benefits at the expense of the other.
7. Give an example of a Predator-Prey relationship.: A lion (predator) killing a zebra (prey)
1/4
, 8. Define phoresies.: In this relationship, the smaller member is carried by the larger member
9. Example of Phoresies.: The bacteria, Moraxella bovis (pink eye), is mechanically carried from the eyes of
one cow to those of another on the sticky foot pads of the face fly. The bacteria is the smaller member and the fly is the
larger member.
10. Define mutualism.: This type of relationship describes an association in which both organisms will benefit
from the relationship
11. Example of mutualism.: The rumen environment of a cow. The cow provides the microbes a place to
live, and in return, they aid in cellulose digestion for the cow.
12. Define commensalism.: This describes a relationship where one organism benefits, and the other
neither benefits or is harmed.
13. Example of commensalism: The shark and remora. The remora is a hitchhiker that attaches to the
shark, and it removes leftover food from the shark after a meal. The shark does not benefit from this, but it does not
harm it.
14. Define parasitism.: This relationship exists between two organisms of different species
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