Classification and Generalities of Parasites Flashcards
Linnean Classification Scheme
Kingdom, Phylum, Class, Order, Family, Genus, Species
Every parasite, except protozoa, are from which kingdom?
Animalia
Dorsoventrally flattened
Platyhelminths
Another name for Platyhelminths
Flatworms
Flattened, unsegmented, leaf-like shape
Endoparasites that live in the liver, GI tract, lungs, or blood
Most are hermaphroditic
Produce operculated, oval eggs that are found in feces
Require a crustacean as an intermediate host
Trematodes (flukes)
All flukes have a _______ life cycle
indirect
Most common crustacean for flukes to be found in
Snails
Ribbon like flatworms found int the small intestines of their definitive hosts
Absorbs nutrients through their tegument
Require an intermediate host
Produce proglottids and are hermaphroditic
These have an enzyme on their body that doesnt allow the host to digest it
No GI tract or mouth
Cestodes
Suction cups that attach to intestines
acetabula
“armed tapeworm”;
barbs or hooks in conjunction to suction cups
rostellum
Segments of the worm’s body that can pass in stool of the host or on it’s own
proglottids
A tapeworm that doesn’t have rostellum is considered
unarmed
The head of the tapeworm
scolex
Help anchor the worm to the intestines
head and neck
Inside every proglottid, there are
Male and Female reproductive organs
Closest to the head and neck
Not capable of reproduction
Immature proglottids
Toward the middle of the worm
Mature/Intermediate proglottids
Pregnant, old proglottids that break off and go back into the environment
Gravid proglottids
Intermediate hosts of tape worms include
fleas, lice, rodents, rabbits, squirrels, pigs, moose, elk, deer
Another name for Nematodes
Roundworms
Named for what they resemble and where they reside
Roundworms
Unsegmented, elongated, round on both ends, circular in cross section, and bilaterally symmetrical
May or may not need an intermediate host
Not hermaphroditic
Nematodes
Coil and uncoil
Nematodes do this to stay within the body
undulate
Largest phylum in the animal kingdom
Ectoparasites
Not all are parasitic
May parasitize the host as adult or juvenile stages
Arthropoda
Animals with jointed legs
Arthropoda
Can cause anemia because they feed on blood
fleas
Phyla is based on locomotory organelles
Protozoa
Protozoa is part of what kingdom?
Protista
Have pseudopodia (false feet)
amoebas
Locomotory organelles are within the cell
apicomplexans
Unicellular organisms
They don’t mate, instead reproduce through binary fission
Protozoans
