Question:
Which of the following parasite does not cause pimply gut condition in animals?
Which of the following parasite does not cause pimply gut condition in animals?
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In veterinary parasitology, Oesophagostomum venulosum is classically distinguished from O. columbianum by its lack of significant nodule formation (no pimply gut) and its milder pathogenicity.
Updated On: Jul 23, 2026
- Oesophagostomum columbianum
- Oesophagostomum venulosum
- Oesophagostomum radiatum
- Oesophagostomum dentatum
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
"Pimply gut" (nodular worm disease) is a pathological condition in livestock characterized by the formation of multiple fibrous, sometimes calcified, nodules in the walls of the large and small intestines.
These nodules are caused by the encysted larval stages of nematodes belonging to the genus Oesophagostomum.
Detailed Explanation:
Let us review the species of Oesophagostomum and their nodule-forming behavior:
- Oesophagostomum columbianum: Infects sheep and goats, causing severe, classic nodule formation (pimply gut).
- Oesophagostomum radiatum: Infects cattle, causing prominent nodule formation in the intestinal walls.
- Oesophagostomum dentatum: Infects pigs, resulting in characteristic nodular worm disease in the colon.
- Oesophagostomum venulosum: Although it infects sheep and goats, its larvae do not typically elicit a strong tissue reaction and do not form prominent, persistent nodules in the intestinal wall. Thus, it does not cause the "pimply gut" condition.
Step 2: Final Answer:
The parasite that does not cause pimply gut is Oesophagostomum venulosum, which corresponds to Option (B).
"Pimply gut" (nodular worm disease) is a pathological condition in livestock characterized by the formation of multiple fibrous, sometimes calcified, nodules in the walls of the large and small intestines.
These nodules are caused by the encysted larval stages of nematodes belonging to the genus Oesophagostomum.
Detailed Explanation:
Let us review the species of Oesophagostomum and their nodule-forming behavior:
- Oesophagostomum columbianum: Infects sheep and goats, causing severe, classic nodule formation (pimply gut).
- Oesophagostomum radiatum: Infects cattle, causing prominent nodule formation in the intestinal walls.
- Oesophagostomum dentatum: Infects pigs, resulting in characteristic nodular worm disease in the colon.
- Oesophagostomum venulosum: Although it infects sheep and goats, its larvae do not typically elicit a strong tissue reaction and do not form prominent, persistent nodules in the intestinal wall. Thus, it does not cause the "pimply gut" condition.
Step 2: Final Answer:
The parasite that does not cause pimply gut is Oesophagostomum venulosum, which corresponds to Option (B).
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