MIC 541-Exam 5-Parisitology 11
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What type of parasite is a hookworm?
What type of worm is Necator americanus?
- 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?
What is the route of infection for Necator americanas?
Penetrate skin of bare feet
What type of parasite enters the body through bare feet?
Describe the lifecycle of Necator americanas:
- Eggs in feces hatch into larvae in the soil
- Larvae penetrate feet
- Transported to lungs
- 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
- abdominal pain
- Reduced development (in children)
What type of parasite is Toxocara canis?
What does Toxocaris canis usually infect?
What other type of parasite is Toxocara canis like?
How do you prevent Toxocara canis?
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?
Describe the morphology of Cestodes:
- Segmented bodies
- Suckers and hooks on head
- No digestive tract
What type of parasites have a flat ribbon shaped segmented body?
What part of Cestodes is important for attachment?
What are the specialized features of Cestodes' heads?
Suckers and hooklets used for attachment
What are Proglottids?
What generates a chain of proglottids on tapeworms?
Do Cestodes have a digestive tratc?
How do Cestodes absorb nutrients?
Through their cuticle
Describe the reproductive system of Cestodes:
What would you like to do?
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