Topics:
Animal Nutrition, Animal Refresher
The Mini-Ruminant Microbe
Which of the following microbe is also known as "mini-ruminant" according to Von Soest?
- Bacteria
- Protozoa — Correct Answer
- Fungi
- Bacteriophage
Explanation:
Correct Answer: Protozoa
According to Von Soest, ruminal Protozoa are called "mini-ruminants" because they engulf feed particles (especially starch granules) inside their cells and ferment them — mimicking the ruminant's own digestive process on a micro scale.
Why Protozoa Are Called Mini-Ruminants
- Protozoa engulf whole feed particles and bacteria inside their cytoplasm
- They ferment starch slowly → prevents rapid acid accumulation (buffers rumen pH)
- They store starch as amylopectin → slow-release energy
- This controlled fermentation pattern mirrors ruminant digestion → "mini-ruminants"
Rumen Protozoa — Key Facts
| Feature | Details |
|---|---|
| Type | Mostly ciliate protozoa |
| Population | 10⁶ per ml rumen liquor |
| Classification | Microfauna |
| Role in population control | Prey on bacteria → controls microbial balance |
| Von Soest's term | "Mini-ruminant" |
Why Other Options Are Wrong
- Bacteria → primary fermenters; not called mini-ruminants
- Fungi → break lignocellulosic bonds; not called mini-ruminants
- Bacteriophage → lyse bacteria; no digestion of feed particles; not mini-ruminants
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
