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Parasitology Terms

Words from lesson 1
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parasite
an organism that lives within, upon, or at the expense of another organism, known as the host.
medical parasitology
area of microbiology concerned with invertebrate organisms capable of producing diseases in humans
lifecycles
Stages of development that a parasite goes through during its life includes growth and development reproduction and transmission routes
Infective stage
the stage of the parasite at which it is capable of entering the host and continuing development within the host
Diagnostic stage
the stage at which a parasite may be detected in human body secretions, discharges, feces, blood or tissue by chemical means or microscopic observation as an aid to diagnosis
Helminths
Multicellular organisms; wormlike invertebrates, includes roundworms and flatworms
Nematode
Roundworms
Nemathelminthes
Trematodes
flukes
Cestodes
tapeworms
protozoa
unicellular organisms
includes: Ameba, Flagellates, Ciliates, Apicomplexa(Sporozoa)
Accidental (or incidental) host
infection of a host other than the normal host species; a parasite may or may not continue full development in an accidental host.
Carrier
a host harboring a parasite but exhibiting no clinical signs or symtons
Commensalism
the association of 2 different species of organisms in which one partner is benefited and the other is neither benefited or injured
Definitive host
the animal in which a parasite passes its adult existence, sexual reproductive phase, or both
Facultative parasite
an organism capable of living an independent or a parasitic existence; not an obligatory parasite, but potentially parasitic
Host
the species of animal or plant that harbors a parasite and provides some metabolic resources to the parasitic species
Intermediate host
the animal in which a parasite passes its larval stage or asexual reproductive phase
Obligatory parasite
a parasite that cannot live apart from its host
Parasitism
the association of 2 different species of organisms in which the smaller species lives on or within the other and has a metabolic dependence on the larger host species
Reservoir host
an animal that harbors a species of parasite that is also parasitic for human and from which a human may become infective
Symbiosis
the association of two different species of organisms exhibiting metabolic dependence by their relationship
Vectors
any arthropods or other living carriers that transport a pathogenic microorganism from an infected to a non-infected host
Zoonosis
a disease involving a parasite that has accidentally infected a human; the normal host for the parasite is an animal
Retroinfection
eggs stay in perianal area, mature, crawl back into intestines
Mammilated
albuminous layer
Corticated
refers to the mammilated outer coat mammilated
Decorticated
refers to the mammilated outer coat non-mammilated
Rhabditiform larva
the feeding but non-infective larval stage, stage that hatches from the egg
Filariform larva
larval stage infective for the definitive host
Indirect life cycle
other rhabditiform larvae may molt into free-living males and females, female lay eggs that hatch into filariform larvae
Autoinfection
development of filariform (infective) larvae occurs in intestine, starts lifecycle in same person