16 Questions
Name the two species of hookworm that infect humans.
Ancylostoma duodenale and Necator americanus
What is the name of the disease caused by hookworm?
Hookworm disease
What is the habitat of adult hookworms in infected persons?
Small intestines, mostly in the jejunum
Where are hookworms mostly found geographically?
Tropical and subtropical climate
Describe the morphology of adult hookworms.
Relatively stout cylindroidal worms, pale pink or greyish white, curved body with the anterior end bent dorsally
What gives the hookworm its name?
Cervical curvature of the anterior end
What is the purpose of the chitinous specializations in the buccal capsules of hookworms?
To attach better to the intestines of their host and make wounds on the intestinal mucosa.
How do hookworms ensure continuous blood flow when feeding?
They secrete a potent anticoagulant from their amphidial glands onto the wound.
What is the function of the copulatory bursa in the male hookworm?
It is expanded into a copulatory bursa which consists of 3 lobes and helps in reproduction.
Describe the characteristics of hookworm eggs.
Oval shaped, measures 60 μm long × 40μm wide, colorless, and surrounded by a thin, hyaline, translucent egg shell.
How many eggs does a single female hookworm lay in a day?
About 25,000–30,000 eggs in a day.
What are the four stages of hookworm larva?
L1 to L4, with the L3 stage being the infective form to humans.
Where is the life cycle of ancylostoma completed?
In a single host.
What is the mode of transmission for hookworms?
Adult worm inhabiting the small intestine of man attach themselves to the mucous membrane by means of their mouth parts.
What is the infective form of hookworm larva to humans?
The L3 stage larva, also known as the filariform larva.
Are hookworm eggs infective for humans when freshly passed in feces?
No, they are not infective for humans when freshly passed in feces.
Learn about the causes and geographical distribution of hookworm, a leading cause of iron deficiency anemia in tropical and temperate regions. Explore the two species infecting humans and their impact on public health.
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