MICROPARA MIDTERMS Flashcards
quiz (24 cards)
a living organism, which takes its nourishment
and other needs from a host;
parasite
an organism which supports the parasite.
host
parasitic organism that lives on the outer surface of its host with examples
Ectoparasite
-lice, mites, ticks
parasites that live inside the body of their host with examples
Endoparasite
Entamoeba histolytica
This parasite is completely dependent on the host during a segment or all of its life cycle.
Obligate Parasite
an organism that exhibits both parasitic and non-
parasitic modes of living and hence does not absolutely depend on the parasitic way of life. Capable of adapting to its place.
Facultative Parasite
when a parasite attacks an unnatural host and survives.
Accidental Parasite
is one that wanders in to an organ in which it is not usually found.
Erratic Parasite
host that harbors a parasite in the adult stage or where the parasite
undergoes a sexual method of reproduction.
Definitive Host
harbors the larval stages of the parasite or an asexual cycle of development takes place.
Intermediate Parasite
a host that serves as a temporary refuge and vehicle for reaching an
obligatory host, usually the definitive host
Paratenic Host
a host that makes the parasite available for the transmission to
another host and is usually not affected by the infection
Reservoir Host
a host that is naturally infected with certain species of parasit
Natural Host
a host that is under normal circumstances not infected with the parasite
Accidental Parasite
Three Common
Symbiotic
Relationship
-Mutualism
-Commensalism
-Parasite Destruction
an association in which both partners are
metabolically dependent upon each other and
one cannot live without the help of the other;
Mutualism
an association in which the commensal takes the benefit
without causing injury to the host.
Commendalidm
an association where one of
the partners is harmed and
the other lives at the expense
of the other.
parasitism
Direct effects of the parasites on the host
-Mechanical injury
-Deleterious effect of toxic substances
- Deprivation of nutrients, fluids and metabolites
Indirect effects of the parasites on the host
-Immunological reaction: Tissue damage
-Excessive proliferation of certain tissues
includes size, shape, color and position of different organelles
in different parasites at various stages of their development.
morphology
importance of morphology
important in laboratory diagnosis which
helps to identify the different stages of development and
differentiate between pathogenic and commensal organisms.
Geographical Distribution —
