Intro To Parasitology Flashcards
What is symbiosis
When two living creatures live together
What is the majority of interactions of living organisms based upon
Food
What is each member of a symbiotic relationship considered
Symbiont
Describe a predator prey symbiotic relationship
Short lived. Beneficial for one and detrimental for other.
What does phoresis mean
To carry.
What is a phoresic symbiotic relationship
One animal caries another
Describe a mutualist relationship
Both organisms benefit
Describe a commensalist relationship
Benefits one organism and has no harm to the other
Describe a parasitic relationship
The parasite lives on or with the host. Metabolic dependence of one on the other.
What is the differences between predator prey relationship and parasitism
Longer relationship. Don’t usually try to kill host.
What is parasitiasis
Presence of parasite with no clinical signs.
What is parasitosis
Presences of parasites and has a disease of parasites (clinical signs)
What is parasitism
A life relationship in which the parasite uses the host as a habitat and a food source.
What are the advantages to parasitism.
Infinite amount of food b
What is advantageous to a parasite with the movement of its host
Dispersion of the parasite
What does the host protect the parasite against
The environment, heat
How does a parasite evade the host fighting it
Attach to host cells, mutate
What are some ways parasites evade the host
Anticoagulants, opiate saliva secretion, covers self with human proteins. Forms cysts
What does the trypanosoma cause
Less milk, lose weight.
What percentage of herds and individuals are infected with trypanosoma
100% of herds and 90% of individuals
What is trypanosoma considered
A chronic, subacute problem.
What are some general things that parasites cause
Anemia, diarrhea, poor growth, malabsorption, respiratory problems, cardiovascular problems, ocular issues
Dermatological issues
What can you get from uncooked beef
Tapeworm
What can you get from uncooked pork
Trichanosis
What parasites can you get from contact with cats
Toxoplasmosis
What parasite can you get from dogs
Toxocaris
What are parasites that live within the body considered
Endoparasites
What do endoparasites do
Cause an infection
What are parasites that live on the body called
Ectoparasites
What do ectoparasites
Infestation
What is an example of ectoparasites
Fleas
Give characteristics of an obligate parasite
Must use the host to survive and complete the development cycle. Can have a period outside host where transmission occurs
What is an example of a facultative parasites
S. Stercoralis
What are the characteristics of a incidental parasites
Short survival
What is an example of a hyper parasite
A tape worm in a flea
What does the parasitic load factor into
The development of the disease
What is the pre patent period
Time frame from infection with a parasite to that when the parasite can be recovered and diagnosed
What is a host
Animal providing habitat for a parasite
What are some general characteristics of parasites
Have at least one definitive host and may have one or more intermediate hosts.
What happens in a definitive host
Parasite matures to sexual and adult stage
What is an intermediate host
Larval, immature and juvenile stage of parasite.
What does toxoplasma gondii do to mice
Convinces mice to approach cats. Gets rid of olfactory receptors in mice brain so mice doesn’t sense danger
What is a paratenic host
Transport host. Form of intermediate host. No development of the parasite. Remains encysted.
What is a reservoir host
Source of infection for different species
What does a vermifuge do
Paralyzed worm to expel
What does a vermicide do
Kills worm
