Advertisement Upgrade to remove ads

Words from lesson 1

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

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set