Topics:
Animal Refresher, Poultry Science
Perosis — Nutrient NOT Responsible
Perosis (Slipped tendon) in poultry is NOT caused by deficiency of:
- Thiamine (Vit. B₁) — Correct Answer
- Manganese (Mn)
- Choline
- Biotin
Explanation:
Correct Answer: Thiamine (Vit. B₁)
Perosis (Slipped tendon / Hock disease) is a leg disorder in poultry characterised by enlargement of hock joint and displacement of gastrocnemius tendon. It is caused by deficiency of Mn, Biotin, Choline, Folic acid, and Niacin. Thiamine (Vit. B₁) is NOT involved in causing Perosis.
Thiamine (Vit. B₁) Deficiency Disease
- Polyneuritis — characterised by star-gazing posture (opisthotonus) in poultry; retraction of head backward.
Complete List of Nutritional Deficiency Diseases in Poultry
- Vit. A: Nutritional roup (nasal discharge, eye discharge)
- Vit. B₁ (Thiamine): Polyneuritis (star-gazing / opisthotonus)
- Vit. B₂ (Riboflavin): Curled toe paralysis (penguin-like posture)
- Vit. E: Crazy chick disease / Encephalomalacia
- Vit. D: Rickets in chicks; Cage layer fatigue in layers
- Biotin: Fatty Liver Kidney Syndrome (FLKS)
- Mn / Choline / Biotin / Folic acid / Niacin: Perosis (Slipped tendon) ✔
- Zn: Swollen hock syndrome
- Mo: Femoral head necrosis
Why Other Options Are Wrong
- Mn, Choline, Biotin → all are genuine causes of Perosis; so the question asks which is NOT a cause, and the answer is Thiamine.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
