immunology 4

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immunology 4
2010-03-16 22:15:43
host parasite relationships

Chap 4
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  1. Carrier State
    The condition when hosts carry potentially pathogenic organisms, but do not show signs of the disease themselves.
  2. Chemotaxis
    The property of attraction of the migration of cells towards a molecule (the chemotactic agent).
  3. Colonization
    The introduction, and continued growth, of microorganisms on a particular body location.
  4. Commensalism
    A biological relationship between two organisms where one species benefits but the second does not appear to benefit, but is not harmed nevertheless.
  5. Opportunistic Pathogen
    An organism which is only capable of causing disease in a host under certain conditions, especially when the host defenses are compromised.
  6. Parasitism
    The biological relationship between two organisms where one organism benefits at the expense of the second, which is harmed to some degree.
  7. Pathogen
    An organism capable of causing a disease.
  8. Resident Microbial Flora
    The organisms that may be expected to be found in a particular body site,
  9. Symbiosis
    A biological relationship between two organisms where both organisms benefit by that relationship.
  10. Transient Microbial Flora
    Organisms that may only temporarily be resident in a particular body site, but are not necessarily pathogens.
  11. True Pathogen
    An organism that is always considered pathogenic at the site it was located, regardless of the immune status of the host.
  12. Virulence
    The capability of an organism to cause disease.
  13. Virulence Factor
    A specific characteristic or molecule, produced by a pathogen, that enhances that organism's ability to cause disease.