Quiz About Nematodes: Trivia Facts!

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| By Andrew Blanshard
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Andrew Blanshard
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Quizzes Created: 9 | Total Attempts: 41,202
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1. Ascaris can be treated with albendazole.

Explanation

True, and with mebendazole or pyrantel pamoate as well.

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About This Quiz
Quiz About Nematodes: Trivia Facts! - Quiz

A quiz about nematodes: trivia facts! There over fifteen thousand identified worms in the phylum Nematoda. These worms occur as parasites in animals and plants or as free-living... see moreforms. They are actually the most common animals on earth and help in controlling pests in most cases. Most Nematodes are harmless to humans and animals. Do take this quiz and get to learn some more about them, their characteristics and importance to the ecosystem.
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2. Ascaris is also called the whipworm?

Explanation

Ascaris is the common round worm, trichuriasis is the whip worm.

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3. Ancylostoma duodenale has no teeth.

Explanation

Anycylostoma does have teeth, necator americanus doesn't (it has plates).

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4. Nematodes are platyhelminths.

Explanation

Cestodes and trematodes are platyhelminths.

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5. Do L3 hookworm larvae have longer buccal cavities than Strongyloides?

Explanation

L3 hookworm larvae have longer buccal cavities than Strongyloides. This means that the hookworm larvae have larger and more developed mouthparts compared to Strongyloides larvae. The length of the buccal cavity is an important characteristic that distinguishes different species of parasites.

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6. Rectal prolapse can occur with which nematode infection?

Explanation

Rectal prolapse is a condition where the rectum protrudes out of the anus. Trichuris trichiura, also known as whipworm, is a nematode infection that can cause chronic inflammation of the large intestine. This chronic inflammation weakens the rectal muscles, making them more susceptible to prolapse. Enterobius, also known as pinworm, primarily affects the intestines but does not directly cause rectal prolapse. Capillaria philippinensis is a nematode that primarily affects the small intestine and does not cause rectal prolapse. Therefore, the correct answer is Trichuris trichiura.

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7. Loeffler's syndrome occurs which nematode infection?

Explanation

Loeffler's syndrome is a reaction to the worm in the lungs. It is treated with prednisolone.

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8. Which 4 worms have lifecycles involving migration to the lungs, being coughed up, swallowed, and down to the intestine?

Explanation

The correct answer is Strongyloides, hookworm, ascaris, and paragonimus. These four worms have lifecycles that involve migration to the lungs, being coughed up, swallowed, and then reaching the intestine.

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9. Properly cooking fish is a control method for which worm?

Explanation

Capillaria philippinensis is transmitted by eating fish (brackish or freshwater). Birds are the definitive host.

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10. Autoinfection can occur with Capillaria philippinensis.

Explanation

Some eggs hatch in the intestine and re-invade the mucosa, whilst others are passed in the feces to be eaten by fish, which are then eaten by humans or birds (the definitive hosts).

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11. Trichuris trichiura are adults are found in the small intestine?

Explanation

They mature to adults and oviposit in the caecum and ascending colon (both large intestine).

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12. Ground itch occurs with which worm infection.

Explanation

Ground itch is a skin condition caused by the larvae of hookworms. These parasites can penetrate the skin, usually through bare feet, and cause an itchy rash and inflammation. The larvae migrate through the skin and eventually reach the intestines, where they mature into adult worms. Hookworm infection is commonly found in areas with poor sanitation and can be transmitted through contaminated soil or feces. Symptoms of hookworm infection may include anemia, abdominal pain, and diarrhea. Treatment typically involves medication to kill the worms and alleviate symptoms.

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13. Nurse-cell larval complexes are found in which worm's lifecycle?

Explanation

The female worms in the mucosa of the small intestine release larvae that migrate to striated muscle and encyst. The lifecycle is continued when this is eaten by other animals.

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14. What are the main reservoirs of Strongyloides?

Explanation

Strongyloides is a genus of parasitic worms that commonly infects dogs and primates. These worms live in the intestines of their hosts and can cause various health issues. While other animals like bears, rats, and sheep can also be infected with different species of Strongyloides, the main reservoirs for this particular genus are dogs and primates.

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15. Parthenogenesis occurs in which worm?

Explanation

Parthenogenesis is a form of reproduction in which an organism can produce offspring without the need for fertilization. Among the given options, Strongyloides is the only worm that is known to exhibit parthenogenesis. This means that Strongyloides worms can reproduce without mating with a male worm, making them unique compared to the other worms listed. Ascaris, Enterobius, and Hookworms reproduce through sexual reproduction, requiring both male and female worms to mate. Therefore, the correct answer is Strongyloides.

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16. Cutaneous larval migrans occurs in Toxocara infection?

Explanation

This occurs with hookworm when the larvae are migrating through the skin. It is caused by Ancylostoma caninum or braziliense and is treated with oral albendazole or topical thiabendazole. Visceral and ocular larval migrans occurs in Toxocara.

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17. Trichuris eggs are passed into the soil embryonated.

Explanation

They are passed unembryonated and embryonated in the soil.

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18. Trichinella spiralis has a high transmission rate in the UK?

Explanation

Trichinella is found worldwide, but there is little or no transmission in the UK. There are much higher rates in Eastern Europe, Asia, and Japan.

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19. The eggs of Capillaria philippinensis are what size?

Explanation

35- 45 with a striated shell and 2 polar plugs (non-protruding unlike trichuris).

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20. Older dogs are a greater source of environmental Toxocara contamination then puppies.

Explanation

In puppies, the larvae migrate to the lungs, bronchial tree, and esophagus to become adults that oviposit, therefore passing eggs in their feces. In older dogs, the larvae encyst rather than becoming adults, so eggs are not passed as much in their feces.

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21. Graham's test can be used for which infection diagnosis?

Explanation

Graham's test is the sellotape method for pinworm eggs.

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22. Visceral and ocular larval migrans are caused by:

Explanation

Visceral and ocular larval migrans are caused by Toxocara. Toxocara is a parasitic roundworm that commonly infects dogs and cats. Humans can become infected by accidentally ingesting the eggs of the parasite, usually through contact with contaminated soil or objects. Once inside the body, the larvae migrate through various organs, including the liver, lungs, and eyes, causing inflammation and damage. This can lead to symptoms such as fever, abdominal pain, cough, and vision problems. Therefore, Toxocara is the correct answer for the cause of visceral and ocular larval migrans.

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23. Which larva can usually be found in fresh feces?

Explanation

Strongyloides is a type of parasitic nematode that commonly infests the intestines of humans and animals. The larvae of Strongyloides can be found in fresh feces. This parasite has a unique lifecycle where the larvae can infect the host through the skin, migrate to the lungs, and eventually reach the intestines where they mature into adults. The presence of Strongyloides larvae in fresh feces indicates an active infection and the potential for transmission to other individuals.

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24. How big is an infertile Ascaris egg?

Explanation

The correct answer is 85 - 90 microns. This means that an infertile Ascaris egg is between 85 and 90 microns in size.

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25. How many times do the Strongyloides L1 larvae have to molt to enter the free-living cycle?

Explanation

The Strongyloides L1 larvae have to molt four times to enter the free-living cycle. Moulting is the process of shedding the old cuticle and forming a new one. Each molt allows the larvae to develop and grow, eventually reaching the infective L3 stage. Once they reach this stage, they can infect a host and continue their life cycle. Therefore, the correct answer is 4.

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Ascaris can be treated with albendazole.
Ascaris is also called the whipworm?
Ancylostoma duodenale has no teeth.
Nematodes are platyhelminths.
Do L3 hookworm larvae have longer buccal cavities than Strongyloides?
Rectal prolapse can occur with which nematode infection?
Loeffler's syndrome occurs which nematode infection?
Which 4 worms have lifecycles involving migration to the lungs, being...
Properly cooking fish is a control method for which worm?
Autoinfection can occur with Capillaria philippinensis.
Trichuris trichiura are adults are found in the small intestine?
Ground itch occurs with which worm infection.
Nurse-cell larval complexes are found in which worm's lifecycle?
What are the main reservoirs of Strongyloides?
Parthenogenesis occurs in which worm?
Cutaneous larval migrans occurs in Toxocara infection?
Trichuris eggs are passed into the soil embryonated.
Trichinella spiralis has a high transmission rate in the UK?
The eggs of Capillaria philippinensis are what size?
Older dogs are a greater source of environmental Toxocara...
Graham's test can be used for which infection diagnosis?
Visceral and ocular larval migrans are caused by:
Which larva can usually be found in fresh feces?
How big is an infertile Ascaris egg?
How many times do the Strongyloides L1 larvae have to molt to enter...
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