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17 Cards in this Set
- Front
- Back
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What are the 5 major subgps of parasites?
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1) Protozoa
2) Cestoidea (tapeworm) 3) Trematoda (flatworm) 4) Nematoda (roundworm) 5) Arthropod |
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What are the 3 differet gps of parasites?
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1) Protozoa
2) Helminths 3 Arthropods |
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What are protozoa?
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Xingle celled eukaryotes
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What phylums ad classes make up helmiths?
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Phylum: Platyhelminthes
-->Calss: Cestoidea --> Class Trematoda Phlum: Nematoda |
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What are helminths?
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Worms, multicellular
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What is included in the arthropod group?
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Vectors/treansmitters of human diseases
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What kind of parasites are protozoa?
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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) |
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Where do protozoa colonize?
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Distinct eological niches in soft organs
Some colonize highly specific areas (GIT, GUT, lyphoreticular tissue, blood, RBCs, striated/soot/myocardial cells) |
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What is an example of a Protozoa gp parasite?
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Toxoplasma gondii
Malaria (RBC) Trichomonas (GI/GUT) Entamoeba (LI) |
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Describe helminths (worms)
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Macro-parasites
Can see them macroscopially Divided into 2 phyla: -->Platyhelminths (flat worms) --> Nematoda (round worms) |
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What are the 2 classes that platyhelmithes fall into?
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1) estoidea (tape worm)
2) Trematoda (flat worm) |
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What are some features of helminth parasites (where for they dwell, size, multi/uicelular)?
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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) |
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Describe the habitat of trematoda.
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Very diver
Bloodvessels Bile duct GIT |
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What are some parasitic arthropods?
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Mosquito
Blood sucking flies Ticks Flees Lice |
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What are the parasitic arthropods known as collectively?
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Ectoparasites
(These include vectors) |
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Which parasitic infection has the highest yearly infection/mortality?
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Malaris
Infects over 500 million ppl Kills 2.7 million |
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Which intestinal parasite has infected the most amount of ppl?
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Ascaris (1 billiob infected, ~60 000 dead)
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