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VET 123 Chapter 1
Parasitology
| Term | Definition |
|---|---|
| Symbiosis | Any two organisms that live together for any amount of time |
| Predator - prey | The predator kills the prey for food |
| Phoresis | When an (usually larger) organism mechanically carries a another one from place to place |
| Mutualism | A relationship where both organisms benefit |
| Commensalism | A relationship where one benefits and the other is neither helped nor harmed. |
| Parasitism | The parasite is metabolically dependent on the host |
| Parasitiasis | The parasite is present and can potentially cause harm, but is apparently not doing so. |
| Parasitosis | The parasite is present on or within the host and is causing obvious harm. |
| Ectoparasites | Live on the outside of the body of the host. |
| Endoparasites | Live on the inside of the body of the host. |
| Erratic or aberrant parasites | When a parasite wanders from its usual living arrangement and is found in an unusual location in the host animal. |
| Incidental parasites | When parasites occupy an unusual host. |
| Facultative/Opportunistic parasite | Normally a free living organism that can become parasitic under the right circumstances |
| Obligatory parasite | These organisms must be inside or on a host in order to grow and/or reproduce. |
| Periodic parasite | These organisms can live away from the host, but must make frequent visits for essential needs. |
| Pseudoparasites | These are bits of material found in feces or other tissues that look like a parasite or parasite eggs, but are not parasites |
| Parasiticides | CHEMICAL COMPOUNDS (BOTH SIMPLE AND COMPLEX) USED TO TREAT SPECIFIC INTERNAL AND EXTERNAL PARASITES. |
| Anthelmintic | a medication capable of causing the evacuation or used to kill parasitic intestinal worms |
| Acaricides | Compounds developed to kill mites and ticks |
| Insecticides | compounds developed to kill insects |
| Antiprotozoals | compounds developed to kill protozoan organisms |
| vector | An animal (usually an arthropod) that transmits or carries the causative organism of a disease |
| Definitive host | Animal that harbors the adult or reproductive stages of the parasite. |
| Intermediate Host | Animal that harbors the immature or juvenile forms of the parasite. |
| Direct life cycle | Single host development No intermediate host required |
| Indirect life cycle | Multiple hosts required for development |
| Prepatent period | Maturation time of a parasite within its definitive host |
| Patent infection (patency) | The host is shedding eggs, etc. This allows for the diagnosis of the infection |
| Encysted | Arrested In “suspended animation” |
| Transport or paratenic host | The parasite remains encysted or arrested in this host until the host is consumed by the definitive host |
| Reservoir host | The vertebrate host in nature that acts as a source for infection of humans or domestic animals |
| Homoxenous or monoxenous parasite | Affects only one type of host |
| sTENOXENOUS | A PARASITE WITH A NARROW RANGE |
| Euryxenous | A parasite with a very broad range |
| zoonosis | Any disease or parasite that can be spread from animals to humans. |
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