WEEK 1: Intro to Para Flashcards
• “ living together”
• Involves protection or other advantages to one or both partners
• Association of two species, perhaps primarily for food getting on the part of one or both members of the group
symbosis
What are the types of symbiotic association?
phoresis, commensalism, mutualism, and parasitism
what are the 2 loose associations?
phoresis and commensalism
what are the 2 intimate associations?
mutualism and parasitism
• means “to carry.”
• a type of symbiotic relationship in which one organism (the smaller phoront) is mechanically carried on or in another species (host).
phoresis
• Means “eating at the same table”
• Occurs when one member of the associating pair, usually the smaller, receives all the benefit and the other member is neither benefited nor harmed
commensalism
• Occurs when each member of the association benefits the other
• Mutuals are metabolically dependent on one another; one cannot survive in the absence of the other
• Often included as a special subcategory of mutualism is cleaning symbiosis
mutualism
Is the relationship in which one of the participants, the parasite, either harms its host or in some sense lives at the expense of the host.
parasitism
para : ________
sitos : ________
para : beside
sitos : grain or food
example of commensalism
Entamoeba coli
example of mutualism
Trichonimpha
What are mechanical injuries that parasites may cause?
• Boring a hole into the host or digging into its skin or other tissues
• Stimulate a damaging inflammatory or immune response
• Or simply rob the host of nutrition
What are the classifications of parasites?
A. According to Habitat
B. According to Effects to the Host
C. According to Modes of Living
parasite lives on the surface of its host
ectoparasite (infestation)
- parasite lives on the internal of its host
- parasite living within the host
endoparasite (infection)
found in an organ which is not its usual habitat
erratic
What are the two classification of parasite according to effects to the host?
pathogenic and non pathogenic
They cannot complete their life cycle without spending at least part of the time in parasitic relationship.
obligate parasites
Are not normally parasitic but can become so when they are accidentally eaten or enter a wound or other body orifice.
Facultative Parasite
Establishes itself in the host wherein it does not ordinary live
accidental pr incidental parasite
Remains on the host in entire life
permanent parasite