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17 Cards in this Set

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What are the 5 major subgps of parasites?
1) Protozoa
2) Cestoidea (tapeworm)
3) Trematoda (flatworm)
4) Nematoda (roundworm)
5) Arthropod
What are the 3 differet gps of parasites?
1) Protozoa
2) Helminths
3 Arthropods
What are protozoa?
Xingle celled eukaryotes
What phylums ad classes make up helmiths?
Phylum: Platyhelminthes
-->Calss: Cestoidea
--> Class Trematoda
Phlum: Nematoda
What are helminths?
Worms, multicellular
What is included in the arthropod group?
Vectors/treansmitters of human diseases
What kind of parasites are protozoa?
Miro-parasites
Single celled EUK
Single/multiple nuclei, locomotory orgaelles, special sub-cellular organelles (ER, golgi, mito)
Multiple asxually/sexually at a high rate
Short generation time (hours)
Where do protozoa colonize?
Distinct eological niches in soft organs
Some colonize highly specific areas (GIT, GUT, lyphoreticular tissue, blood, RBCs, striated/soot/myocardial cells)
What is an example of a Protozoa gp parasite?
Toxoplasma gondii
Malaria (RBC)
Trichomonas (GI/GUT)
Entamoeba (LI)
Describe helminths (worms)
Macro-parasites
Can see them macroscopially
Divided into 2 phyla:
-->Platyhelminths (flat worms)
--> Nematoda (round worms)
What are the 2 classes that platyhelmithes fall into?
1) estoidea (tape worm)
2) Trematoda (flat worm)
What are some features of helminth parasites (where for they dwell, size, multi/uicelular)?
Only extracellular (lumen dwellers: GI or bile duct, tissue interstitium of various soft organs)
Size: highly variable: few mm to 20 m
Multicellular
Members possess organ systems (tegument/body wall, GIT, excretory system, nervous system, reproductive system)
-> Reproductive organ can be monoecious (M+F in 1 or dioecious separate sexes)
Describe the habitat of trematoda.
Very diver
Bloodvessels
Bile duct
GIT
What are some parasitic arthropods?
Mosquito
Blood sucking flies
Ticks
Flees
Lice
What are the parasitic arthropods known as collectively?
Ectoparasites
(These include vectors)
Which parasitic infection has the highest yearly infection/mortality?
Malaris
Infects over 500 million ppl
Kills 2.7 million
Which intestinal parasite has infected the most amount of ppl?
Ascaris (1 billiob infected, ~60 000 dead)