parasites

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parasites

• PUB403 part 3 sups

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Hookworm agent

• http//www.missouri.edu/mmiwww/slides2.html
• Eggs and adults dimensions and characteristics

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hookworm

• http//www.medcor.mcgill.ca/tropmed/td/txt/lectur
  e4.htm
• Filariform larva ( 1 mm)

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hookworm

• Images
• http//www.discoverlife.org/nh/tx/Nematoda/
• larvae

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Hookworm hooks

• http//dmturner.org/Teacher/Projects/Hookworm.html
  
• Picture of head

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Hookworm life cycle

• http//www.merck.com/pubs/mmanual_home/illus/184i2
  .htm

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Cutaneous larva migrans

• http//www.biosci.ohio-state.edu/parasite/clm.htm
  l
• Non-human (dog, cat etc) hookworms that penetrate
  human skin (as does human hookworm) but cannot go
  further. Migrate and produce serpiginous itchy
  traits in subcutaneous tissue.

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ascariasis

• http//martin.parasitology.mcgill.ca/JIMSPAGE/asca
  ris.htm
• Photo courtesy of Peter Darben sizes
• estimated 1 billion people infected world wide.
• These large worms, often up to 30 cm in length,
  inhabit the intestinal lumen. Each female worm
  produces approximately 200,000 eggs per day with
  an estimated total of 27 million during its life
  span. The eggs are highly resistant to adverse
  environmental conditions which contributes to its
  widespread distribution.

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Ascaris life cycle

• http//www.dpd.cdc.gov/DPDx/HTML/ImageLibrary/Asca
  riasis_il.htm

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Taenia

• http//martin.parasitology.mcgill.ca/jimspage/taen
  ia.htm
• Pork tapeworm this long flat ribbon like
  parasite averages 6 - 10 feet long but can reach
  30 feet in length

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Taenia -

• Life cycle showing the progression of the
  proglottids
• http//users.rcn.com/jkimball.ma.ultranet/BiologyP
  ages/T/Tapeworms.html

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Taenia

• http//www.dpd.cdc.gov/dpdx/HTML/Frames/S-Z/Taenia
  sis/body_Taeniasis_page1.htm
• Life cycle with cysticerci

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Taenia information

• http//www.biosci.ohio-state.edu/parasite/taenia.
  html
• Cysticercosis next slide

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Taeniasis life cycle

• http//www.courses.ahc.umn.edu/medical-school/IDis
  /Helminth/taenia.cycle.html

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cysticercosis

• http//www.biosci.ohio-state.edu/parasite/taenia.
  html
• Thus, even though infections with adult T. solium
  are rarely a problem, treatment of such
  infections is absolutely essential
• Cysticercosis of the brain

http//martin.parasitology.mcgill.ca/ jimspage/tae
nia.htm Cysticerca in muscle
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Ohio parasites

• A tissue section of a cysticercus in muscle. 
  Note the fibrotic capsule () around the
  cysticercus
• Cysticercosis.htm

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amoebiasis

• Life cycle
• http//www.biosci.ohio-state.edu/7Eparasite/lifec
  ycles/entamoeba_lifecycle.html

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Amoebiasis

• http//www.biosci.ohio-state.edu/parasite/histoly
  tica_phase.html
• Phase contrast photomicrograph of cultured
  Entamoeba histolytica trophozoites.  Original
  image provided by Steve Aley. (shows internal
  morphology)

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amoebiasis

• http//www.biosci.ohio-state.edu/parasite/ehistol
  ytica.html
• Trophozoite living form
• Cyst infective form, from immature (1 nucleus)
  to mature (4 nuclei) 18µ

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Hydatid cyst

• http//www.biosci.ohio-state.edu/parasite/echinoc
  occus.html
• Geographic distribution association with
  husbandry
• Life cycle

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e.granulosus

• Intestine of a dog, covered with worms
• Original image from F. Rochette, 1999, Dog
  Parasites and Their Control, Janssen Animal
  Health, B.V.B.A.
• tapeworm's body only three proglottids and
  measures only about 5 mm in length

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Hydatid cyst
Cerebral hydatidosis Hydatid cyst microscopy
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Liver cyst

• http//www.medcor.mcgill.ca/tropmed/td/txt/lectur
  e5.htm
• Hydatid cyst in left lobe of liver note the
  laminar membrane split off  the outer wall (cat
  scan).

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Parasites resources

• http//www.biosci.ohio-state.edu/parasite/home.ht
  ml
• Pictures of all sorts
• http//www.ohd.hr.state.or.us/phl/imglib/welcome.h
  tm
• http//www.missouri.edu/mmiwww/slides2.html
• http//www.dpd.cdc.gov/DPDx/HTML/Image_Library.htm
  

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The End