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The Eukaryotes 12d: Animals

The Eukaryotes 12d: Animals. Helminths & Arthropods. Helminths reduced or no digestive system reduced nervous system no or reduced locomotion life cycle is usually complex. For the CDC versions of parasite life cycles http://www.dpd.cdc.gov/dpdx/Default.htm.

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The Eukaryotes 12d: Animals

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  1. The Eukaryotes 12d: Animals Helminths & Arthropods

  2. Helminths reduced or no digestive system reduced nervous system no or reduced locomotion life cycle is usually complex For the CDC versions of parasite life cycles http://www.dpd.cdc.gov/dpdx/Default.htm

  3. Phylum Platyhelminthes = flat worms Class Cestoda = tapeworms 2 body parts hermaphroditic 23.13

  4. Taenia saginata = beef tapeworm T. solium = pig tapeworm 23.14 cysticercus (immature form in muscle) “dead-end host” Def. host

  5. Echinococcus granulosus

  6. Diphyllobothrium latum = broad fish tapeworm Def. host

  7. Phylum Platyhelminthes = flat worms Class Trematoda = flukes snails are usually the intermediate hosts usually hermaphroditic except schistosomes 23.16

  8. Schistosoma = blood fluke Infects >200 million people/year 2 sexes 23.17

  9. Swimmer’s itch Cercaria in skin

  10. Fasciola = sheep liver fluke (Dhost: sheep & other grazing animals; humans are “accidental”) hermaphroditic 23.17

  11. Phylum Nematoda

  12. Ascaris hookworms: Necator & Ancylostoma

  13. Enterobius vermicularis = pinworm

  14. Trichinella

  15. microfilariae Wucheria

  16. Dracunculus medinensis = guinea worm

  17. Anisakine worms: Anisakis & others (~2 cm long) Def. host

  18. Phylum: Annelida (segmented worms) Class: Hirudinae (leeches) FDA approved Hirudo medicinalis leech jar

  19. Arthropod vectors 23.24 Arachnids Insects

  20. Considered “diseases” Sarcopti scabiei = scabies, mange Can be STI

  21. Pediculus capitis Lice: Pediculus spp. Phthirus pubis = crab/pubic louse

  22. Maggot therapy - for treating non-healing wounds. Blowflies (Calliphoridae) usual species: Phaenicia sericata (green blowfly) (FDA approved) 1. They clean the wounds by dissolving dead and infected tissue ("debridement"); 2. They disinfect the wound (kill bacteria); 3. They speed the rate of healing. For more info: http://www.medicaledu.com/maggots.htm#Current status of maggot therapy (maggot)

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