General and Parasitic Characteristics of Nematodes

Play an AI-generated podcast conversation about this lesson

What is the approximate length of adult female Ascaris lumbricoides?

20 to 35 cm (correct)

5 to 10 cm

40 to 50 cm

12 to 25 cm

How does ascariasis primarily infect humans?

Through mosquito bites

Through sexual contact

Through contaminated food, water, or raw vegetables (correct)

Through airborne transmission

How many eggs per day can a female Ascaris lumbricoides produce?

200,000 eggs (correct)

500,000 eggs

100,000 eggs

50,000 eggs

Which type of soil conditions are optimal for the embryonation of Ascaris lumbricoides eggs?

Moist and warm soil Signup and view all the answers

What is the correct order of the life cycle stages of Ascaris lumbricoides?

Egg, larvae, adult Signup and view all the answers

What is the common name for Ascaris lumbricoides?

Roundworm Signup and view all the answers

Where do adult hookworms reside in the human body?

Small intestine Signup and view all the answers

What is the infective stage of hookworm larvae called?

Filariform larvae Signup and view all the answers

How long can infective hookworm larvae survive in favorable environmental conditions?

4 weeks Signup and view all the answers

Which antiparasitic medication is NOT mentioned as a treatment for hookworm infection?

Chloroquine Signup and view all the answers

How do hookworm larvae enter the human body during infection?

Penetration through the skin Signup and view all the answers

Which characteristic distinguishes Ancylostoma duodenale from Necator americanus in adult females?

$10 - 13$ mm vs. $9 - 11$ mm length Signup and view all the answers

What is the treatment duration for hookworm infections with albendazole?

1-3 days Signup and view all the answers

How does Strongyloides stercoralis infection typically begin?

Through skin penetration by filariform larvae Signup and view all the answers

What is characteristic of Strongyloides stercoralis life cycle compared to most nematodes?

It alternates between free-living and parasitic cycles Signup and view all the answers

How do rhabditiform larvae passed in the stool develop into infective filariform larvae?

By molting twice Signup and view all the answers

What distinguishes the Strongyloides stercoralis life cycle in terms of larval development?

Larvae undergo four molts before maturing into adults Signup and view all the answers

In what way do infective filariform larvae initiate the parasitic cycle in the human host?

By penetrating the skin Signup and view all the answers