Topics:
Animal Nutrition, Animal Refresher
Facts About Polyether Ionophores
Which is/are true about polyether ionophore antibiotics?
- Monensin (trade name-rumensin) is produced by Streptomyces cinnamonensis
- Lasalocid (trade name-bovitec) is produced by fungus Streptomyces lasaliensis
- Lasalocid is more potent than monensin
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
All three statements about polyether ionophore antibiotics are correct and factually accurate from standard animal nutrition references.
Verification of Each Statement
| Statement | Verification |
|---|---|
| Monensin (trade name Rumensin) produced by Streptomyces cinnamonensis | TRUE — widely established fact |
| Lasalocid (trade name Bovitec/Bovatec) produced by Streptomyces lasaliensis | TRUE |
| Lasalocid is more potent than monensin | TRUE — Lasalocid binds both monovalent AND divalent cations; broader spectrum and greater potency |
Effects of Ionophores on Rumen Fermentation
- Increase ruminal propionate (gluconeogenic) → improve feed efficiency
- Decrease ruminal acetate → decrease Acetate:Propionate ratio
- Decrease CH₄ production (7% of GE lost as methane in normal rumen)
- Inhibit biohydrogenation and suppress urease activity → less NH₃ formed
📚 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.
