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The Eukaryotes 12d: Animals

Learn about the life cycles, characteristics, and impact of various helminths and arthropods in animals, including tapeworms, flukes, and insects. Explore their hosts, transmission, and implications through detailed information provided by CDC and medical sources. Discover fascinating facts about specific species and their unique features. Enhance your knowledge on these parasites for better understanding and prevention strategies.

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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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