Intestinal Nematodes

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Which sensory organ is used for the characterization of medically important nematodes?

Antennae

Taste buds

Phasmids (correct)

Eyes

What is the life cycle stage of the larva that is infective and non-feeding?

Adult

Filariform (correct)

Rhabditiform

Egg

How are medically important nematodes different from segmented organisms?

They lack repeating segments with complete reproductive parts (correct)

They have a complete digestive tract

They have a circulatory system

They are not bilaterally symmetrical

What is the Phylum of Strongyloides stercoralis?

Nematoda Signup and view all the answers

How long is the adult parasitic female of Strongyloides stercoralis?

2 mm long Signup and view all the answers

In which part of the body is the vulva located in the adult parasitic female of Strongyloides stercoralis?

⅓ of the body length from the posterior end Signup and view all the answers

What is the color of the adult parasitic female of Strongyloides stercoralis?

Colorless Signup and view all the answers

What is the approximate size of the rhabditiform larva of Strongyloides stercoralis?

225 µm in length Signup and view all the answers

Which feature distinguishes the filariform larva of Strongyloides stercoralis from the rhabditiform larva?

Distinct cleft at the tail Signup and view all the answers

What characterizes the free-living adult female Strongyloides stercoralis morphology?

Tapered conical posterior end cuticle Signup and view all the answers

Why should hookworms always be kept in mind when discussing Strongyloides?

They have a similar route of infection through skin penetration Signup and view all the answers

What is the size of C.philippinensis eggs?

35-45 μm in length and 20-25 μm in width Signup and view all the answers

What distinguishes the eggs of C.philippinensis?

Elongated or peanut shaped with a thick, radially-striated shell Signup and view all the answers

What does autoinfection in C.philippinensis refer to?

Live larvae directly produced may reinvade the intestinal mucosa and repeat the life cycle Signup and view all the answers

What is the infective stage of C.philippinensis?

Larva Signup and view all the answers

How are fish infected with C.philippinensis?

By ingesting eggs passed in stool which may contaminate water sources Signup and view all the answers

What distinguishes the first-generation adult females of C.philippinensis?

Release eggs with thin shells and larva Signup and view all the answers

Intestinal Nematodes

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