Micriobio Lab Quiz (parasitology vocabulary handout)

symbiosis

two different types of organisms living together

Mutualism

2 organisms of different species live in a relationship where both benefit

Commensalism

relationship where 1 organism benefits and the other does not, but is not harmed

parasitism

a relationship in which 1 organism lives off another (host) and cause harm to the host

host

any organism that supports another organism

definitive host

kingdom Protista- the host in which the parasite undergoes sexual reproduction

kingdom Animalia- the host in which the adult worm is found

intermediate host

Kingdom Protista- the host in which the parasite undergoes asexual reproduction

Kingdom Animalia- the host in which the juvenile form of the worm is found

reservoir host

infected organism (usually an animal) which makes the parasite available for transmission to other hosts

ectoparasite

a parasite that lives on the outer surface of the host

ticks, lice, fleas

endoparasite

a parasite that lives inside the host

tapeworm, Giardia, Plasmodium

Biological vector

an organism in which the parasite undergoes part os its lifecycle and then transmits the parasite to another orgnaims

female Anopheles mosquito

Mechanical vector

an organism that transmits a parasite, but not part of the parasites life cycle files, roaches, rodents

Hermaphrodite (monoecious)

animal that has both male and female reproductive organs

Cyst

spore like stage of protozoa

thick wall- distant to unfavorable environment

Trophozoite

active, motile, feeding stage of protozoa

Oocyst

cyst form in genus Plasmodium, Cryptosporidium, Toxoplasma

Nematodes

round worms

Ascaris, Enterobius, and hookworms

Filarial worm

thread-like roundworm

Microfilariae

larval stage of thread-like roundworm

larva

juvenile form of a worm

ova

egg

Platyhelminthes

flat worms

trematodes (flukes) and cestodes (tapeworms)

Cysticerci

larval stage of tapeworms, containing a single scolex within a thin walled bladder

Cercaria

free swimming larval stage of trematodes (flukes)

Metacercaria

encysted stage of flukes