Multiple choice

Which among the following statements regarding Strongyloididae worms is false?

  1. They are unique amongst nematodes, being capable of both parasitic and free-living reproductive cycles.

  2. Transmission of the worm involves a geo-helminth phase.

  3. Thread-worm infections occur in a range of mammalian species throughout the world.

  4. Parasitic worms are all parthenogenetic males.

  5. Free-living male and female worms have a rhabditiform pharynx and are smaller in size.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parasitic worms are all parthenogenetic females, measuring from 2-3mm in length and characterised by the presence of an extremely long filariform pharynx (one third of body length) and a blunt pointed tail.

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