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parasite
an organism that lives within, upon, or at the expense of another organism (host)
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pseudoparasite
false parasite (dust, pollen, hair, etc.)
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spurious parasite
parasite infesting a host that is not its normal host; also called accidental parasite or incidental parasite
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host
organism from wchich a parasite obtains its nourishment
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intermediate host
host in which a parasite undergoes a stage in its development (usually larval or non-reproductive stage)
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biological vector
arthropod (insect, tick, etc.) in whose body the parasite develops or multiplies before becoming infective and spread to another organism
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mechanical vector
temporary host needed to spread the parasite but is not needed in order for it to mature (ex: fly trasmits eggs from one host to another on its feet)
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helminth
worm-like animals, either free0living or parasitic belonging to the Phyla Platyhelminthes (flatworms), Acanthocephala (spiny-headed worms), Nemathelminthes (threadworm or roundworm), or Annelida (segmented worm)
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anthelminthic, anthelmintic
agent that destroys parasitic intestinal worms
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insecticide
agent that kills insects
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acaricide
agent that kills ticks and mites
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prepatent period
period between the time of introduction of a parasite organism into the body and its first appearance in the blood or tissue
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patent period
"Open period" - period of elimination of ova or young parasites
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acariasis, acarinosis, acaridiasis
any disease caused by a mite or acarid
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ascariasis
condition resulting from infestation by the Ascarid family
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myiasis
condition resulting from infestation by larvae (maggots) of flies
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McMaster Technique
quick, simple quantitative technique for counting parasite eggs in ruminant feces, based on floatation of concentrated salt solutions in a counting chamber, much like a hemocytometer
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Baermann Technique
laboratory method for separating parasite larvae from feces, soil, or herbage for counting or indentification
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ectoparasite
parasite living on the surface of the host's body
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endoparasite
parasite that lives within the host's body
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transplacental
literally "through the placenta" - penetration of the placenta by an organism, toxin, or chemical that would affect the fetus
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transmammary
transmission of an organism, toxin, or chemical from mother to young via the milk
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proglottid
one of the segments making up the body of a tapeworm
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hydatid cyst
cyst formed in the tissues resulting from the development of certain tapeworms, may grow to enormous size over a period of years
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microfilaria
larva of worms in the superfamily Filariodea, found in the blood and/or tissues of animals infected with the adult worms
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trophozoite
active, motile feeding stage of flagellate protozoa such as Giardia spp.
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oocyst
resistant stage of the life cycle of coccidial parasites, can survive for long periods of time, under appropriate conditions it can mature and become infective
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