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Anthelmintics and Helminth Infections
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1
Question
What is the generic name and common brand formulation for the antihelminthic indicated as a first‑line agent for whipworms, pinworms, roundworms, and hookworms on this page?
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Answer
Mebendazole — marketed as Vermox® (tablet, 100 mg).
2
Question
Which class of antihelminthic is mebendazole grouped under on this page?
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Answer
Benzimidazoles.
3
Question
According to the material on this page, mebendazole is a first‑line agent for which intestinal worm commonly called whipworm?
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Answer
Whipworms (Trichuris species) — mebendazole is listed as a first‑line agent for whipworm infections.
4
Question
Which intestinal parasite indicated on this page is specifically treated by mebendazole and is commonly known as pinworm?
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Answer
Pinworms (Enterobius species) — mebendazole is a first‑line agent.
5
Question
Which roundworm infection is listed on the page as being a first‑line indication for mebendazole?
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Answer
Roundworms (Ascaris species) — mebendazole is indicated as a first‑line agent.
6
Question
According to the page, mebendazole is a first‑line treatment for which group of worms acquired typically by skin penetration or ingestion and called hookworms?
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Answer
Hookworms — mebendazole is listed as a first‑line agent for hookworm infections.
7
Question
What are the two adverse effects of mebendazole explicitly listed on this page?
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Answer
Abdominal pain and diarrhea.
8
Question
Which patient population is explicitly stated on the page as one in whom mebendazole should not be used?
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Answer
Pregnant women — mebendazole should not be used in pregnancy.
9
Question
What is the primary mechanism of action described on the page for piperazine regarding Ascaris paralysis?
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Answer
Piperazine causes paralysis of Ascaris by blocking acetylcholine at the myoneural junction.
10
Question
After piperazine causes paralysis of worms by blocking acetylcholine, how are the live worms removed from the host according to the page?
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Answer
Live paralyzed worms are expelled by intestinal peristalsis.
11
Question
For which infection is piperazine described as an alternative treatment with cure rates over 90% when taken for 2 days?
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Answer
Ascariasis — piperazine is described as an alternative treatment for ascariasis with >90% cure rates when taken for 2 days.
12
Question
List three common adverse reactions of piperazine described on this page.
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Answer
Nausea, vomiting, and diarrhea (also abdominal pain and dizziness are noted).
13
Question
Which less common but serious adverse effect is noted for piperazine on this page?
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Answer
Rare neurotoxicity.
14
Question
Name three contraindications for piperazine given on the page.
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Answer
Pregnancy; impaired renal or hepatic function; epilepsy.
15
Question
What is the example brand and formulation of piperazine listed on the page?
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Answer
Helmicid® syrup (100 ml).
16
Question
According to the page, what is the mechanism of action of pyrantel at the parasite neuromuscular junction?
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Answer
Pyrantel acts as a depolarizing neuromuscular‑blocking agent — it causes release of acetylcholine and inhibits cholinesterase, leading to worm paralysis.
17
Question
What is the direct result on the worm when pyrantel causes release of acetylcholine and inhibits cholinesterase, as stated on the page?
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Answer
Paralysis of the worm, which is then expelled by intestinal peristalsis.
18
Question
Why does pyrantel primarily exert its effects in the intestinal tract according to the page?
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Answer
Because pyrantel is poorly absorbed orally, it remains in the intestinal lumen and acts locally there.
19
Question
Which three types of intestinal nematodes are listed on this page as indications for pyrantel?
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Answer
Roundworms, pinworms, and hookworms.
20
Question
What is the brand name of pyrantel given on this page?
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Answer
Combantrin® (tablets, suspension).
21
Question
How does the mechanism of piperazine differ from that of pyrantel according to the page content?
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Answer
Piperazine blocks acetylcholine at the myoneural junction to produce flaccid paralysis, whereas pyrantel is a depolarizing neuromuscular blocker that causes acetylcholine release and inhibits cholinesterase, leading to a different form of neuromuscular disturbance and paralysis.
22
Question
Which antihelminthic on the page is described as having a mechanism similar to pyrantel?
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Answer
Levamisole (Decaris®) — its mechanism is described as similar to pyrantel.
23
Question
For which infection is levamisole indicated according to the page?
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Answer
Ascaridosis (infection with Ascaris species).
24
Question
Besides its anthelmintic action, what immunologic effect is attributed to levamisole on this page?
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Answer
Levamisole stimulates T‑helper lymphocytes (T‑helpers).
25
Question
What is the brand name for levamisole provided on the page?
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Answer
Decaris® (tablets).
26
Question
How are trematodes (flukes) described morphologically on this page?
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Answer
Trematodes (flukes) are described as leaf‑shaped flatworms.
27
Question
According to the page, the characterization of trematodes is often based on the tissues they infect. Which two example organs are given?
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Answer
Liver and lung (the page notes they are generally characterized by the tissues they infect, for example liver or lung).
28
Question
Name one trematode species listed on the page that is typically associated with liver infection.
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Answer
Fasciola hepatica is listed (a liver fluke).
29
Question
Which trematode species listed on the page is known as the Chinese liver fluke?
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Answer
Clonorchis sinensis (listed among trematodes).
30
Question
Which two Schistosoma species are explicitly mentioned on the page?
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Answer
Schistosoma haematobium and Schistosoma mansoni.