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MIC 541-Exam 5-Parisitology 11
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What type of parasite is a hookworm?
Helminth-Nematode-Intestinal Nematode
What type of worm is Necator americanus?
Hookworm
Intestinal Nematode
Where are Hookworms found geographically?
Tropical and subtropical areas
High rainfall
Warm climate
What percent of the world's population is infected with Necator americanas?
20%
What is the route of infection for Necator americanas?
Penetrate skin of bare feet
What type of parasite enters the body through bare feet?
Necator americanas
Describe the lifecycle of Necator americanas:
Eggs in feces hatch into larvae in the soil
Larvae penetrate feet
Transported to lungs
Swallowed
Mature into adults in the intestines
Where does the adult Necator americanas reside?
In the small bowel
How does Necator americanas acquire nutrients?
Sucking blood from the mucosa
What are the symptoms of Necator americanas?
Few worms = asymptomatic
Iron deficiency anemia
Rash
abdominal pain
Reduced development (in children)
What type of parasite is Toxocara canis?
Helminth-Nematode-Tissue nematode
What does Toxocaris canis usually infect?
Dogs
What other type of parasite is Toxocara canis like?
Ascaris
How do you prevent Toxocara canis?
Worm dogs
What part of the life cycle of Toxocara canis are humans?
Dead end hosts, not part of lifecycle
What are the symptoms of Toxocara canis in humans?
Usually asymptomatic
May cause rash, asthma and neurological defects
What is the pathogenesis of Toxocara Canis?
Invades tissues
Makes granulomas
Cestodes are what type of parasites?
Helminths
Describe the morphology of Cestodes:
Flat
Ribbon-shaped
Segmented bodies
Suckers and hooks on head
No digestive tract
What type of parasites have a flat ribbon shaped segmented body?
Cestodes (Tapeworms)
What part of Cestodes is important for attachment?
Head
What are the specialized features of Cestodes' heads?
Suckers and hooklets used for attachment
What are Proglottids?
Reproductive structures
What generates a chain of proglottids on tapeworms?
The neck
Do Cestodes have a digestive tratc?
No
How do Cestodes absorb nutrients?
Through their cuticle
Describe the reproductive system of Cestodes:
Hemaphroditic
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Author
kyleannkelsey
ID
218365
Card Set
MIC 541-Exam 5-Parisitology 11
Description
MIC 541-Exam 5-Parisitology 11
Updated
2013-05-07T21:12:10Z
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