L9 pathogens&parasites

L9 pathogens&parasites - BILD 3 July 9, 2010 FRIDAY...

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BILD 3 July 9, 2010 Woodruff: pathogens & parasites 1 FRIDAY 9th: PARASITES, PLAGUES & PEOPLE Review 27(571-2), 28 (pathogens), 31(650-1) and Read 33(666-9, 674-6, 683) MARINE INVERTEBRATES Read chapters 32, 33 [but skip the insects] MONDAY 12th: INSECTS Read rest of chapter 33 VERTEBRATES Chapter 34 WEDNESDAY 14 th : midterm test (50 minutes, multiple choice Q) Cast of Characters & Terms Viruses, bacteria, protists Platyhelminthes Trematodes: flukes; Cestodes: tapeworms Nematodes: roundworms Annelids: polychaetes, oligochaetes, leeches Molluscs: snails Arthropods: crustaceans, insects (incl. fleas, flies, mosquitoes, lice), spiders (incl. ticks, mites) Vectors: insects, ticks, mites, snails, birds, mammals Hosts: intermediate and final Reservoirs and commensals Zoonoses : human disease of animal origin. (zoonotic) Parasitism: most popular life style on earth Parasite pathogenicity, prevalence, morbidity, mortality Five major groups of animals BILATERIA Bilateria 3 groups Lophotrochozoans Platyhelminthes Molluscs Annelids Ecdysozoans Nematodes Arthropods Deuterostomes Turbellaria flatworms Trematoda flukes Cestoda tapeworms PLATYHELMINTHES: Turbellaria: free-living flatworm Planaria : common freshwater flatworm is < 1 inch long PLATYHELMINTHES: Trematoda: flukes ADULT SCHISTOSOMES BLOOD FLUKES 250 million people Male in groove on female < 10 mm long PLATYHELMINTHES Cestoda: tapeworms Adults in mammal gut Taenia saginata : cattle T. solium : pigs
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BILD 3 July 9, 2010 Woodruff: pathogens & parasites 2 OLIGOCHAETES POLYCHAETES ANNELIDA: SEGMENTED WORMS HIRUDINEA: leeches OTHER PARASITIC WORMS: Nematodes : roundworms p. 683 C. elegans C aenorhabditis elegans is a soil-dwelling model organism Acanthocephalans : thorny-headed worms (p. 668: affect host behavior) Nemertea : ribbon or proboscis worms (p. 668) Nematomorpha : horsehair worms (not in Campbell) NEMATODA: ROUNDWORMS ACANTHOCEPHALANS: thorny-headed worms (p. 668: affect host crab behavior). Aquatic insects to rats to pigs NEMERTEA: ribbon or proboscis worms NEMERTEA: ribbon or proboscis worms marine bootlace worm grows to 100 ft! NEMATOMORPHA: horsehair worm emerging OLD ADVERTISEMENT FOR FILTERED WATER, LONDON, ENGLAND
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BILD 3 July 9, 2010 Woodruff: pathogens & parasites 3 INFECTIOUS DISEASES (millions of cases/yr) Prevalence Mortality Diarrheal 5,000 10 Respiratory ? 5 Malaria 900 2 Schistosomiasis 250 <1 Whooping cough* 70 0.3 Tuberculosis 1,000 1 Tetanus* 0.1 0.1 Diptheria* 40 - Hookworm 900 - Trypanosomiasis 12 - Ascariasis 1,000 - Measles 85 1 *Diptheria, Pertussis, Tetanus = DPT inoculation DISEASES AND RECENT HUMAN HISTORY Fall of Athens: 429 BC 1/4 of army dies (unknown disease) Fall of Rome : 165–180 AD: Antonine plague kills 1/4 of pop. (probably smallpox or measles),
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This note was uploaded on 07/28/2010 for the course BIOLOGY BILD 3 taught by Professor Davidwoodruff during the Summer '10 term at San Diego.

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L9 pathogens&amp;amp;parasites - BILD 3 July 9, 2010 FRIDAY...

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