Topics:
Animal Nutrition, Animal Refresher
Egg White Injury Factor
Egg white injury factor is:
- Biotic
- Avidin — Correct Answer
- Both
- None
Explanation:
Correct Answer: Avidin
Avidin is a glycoprotein found in raw egg white. It binds strongly and irreversibly to biotin (Vitamin B8), making biotin unavailable for absorption — a condition called egg white injury.
Avidin — Key Facts
- Avidin: Egg white injury factor (found in raw egg albumin)
- Biotin: Anti-egg white injury factor (the vitamin that Avidin antagonises)
- Feeding excess raw egg white → Avidin binds Biotin → Biotin deficiency → Fatty Liver Kidney Syndrome (FLKS) in chicks, "Spectacle eye" in rats
- Cooking destroys Avidin (it is heat-labile) → cooked egg white is safe
Biotin Deficiency Diseases
| Species | Deficiency Sign |
|---|---|
| Chicks/Broiler | Fatty Liver Kidney Syndrome (FLKS); Sudden Death Syndrome |
| Rat | "Spectacle eye" — hair loss around eyes |
Why Other Options Are Wrong
- Biotic → not a real nutritional compound; "Biotin" is the vitamin, not "Biotic"
- Both → Avidin alone is the egg white injury factor; Biotin is its antagonist, not a second "injury factor"
- None → incorrect; Avidin is well-established as the egg white injury factor
📚 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.
