Topics:
Animal Refresher, Poultry Science
Maximum Aflatoxin B₁ Limit in Broiler and Layer Feed
The maximum limit of Aflatoxin B₁ (ppb) permitted in both broiler and layer feed is:
- 10 ppb
- 15 ppb
- 20 ppb — Correct Answer
- 50 ppb
Explanation:
Correct Answer: 20 ppb
As per BIS (Bureau of Indian Standards) 2007, the maximum permissible limit of Aflatoxin B₁ in both broiler and layer feed is 20 ppb (parts per billion).
What is Aflatoxin B₁?
- Produced by the fungus Aspergillus flavus and A. parasiticus, particularly in stored maize, groundnut cake, and cottonseed cake under warm, humid conditions.
- Aflatoxin B₁ is the most potent naturally occurring carcinogen known.
- In poultry, it causes Aflatoxicosis: reduced feed intake, poor growth, immunosuppression, liver damage, and reduced egg production.
BIS Aflatoxin Limits Across Feed Types
- All poultry feeds (broiler pre-starter to layer phase II): 20 ppb Aflatoxin B₁ maximum.
Related Fungal Diseases in Poultry
- Aspergillosis (Brooder pneumonia): Caused by Aspergillus fumigatus; respiratory disease in young chicks from contaminated litter/hatchery environment.
- Aflatoxicosis: Caused by dietary Aflatoxin B₁ > 20 ppb (from Aspergillus flavus/parasiticus in mouldy feed).
Why Other Options Are Wrong
- 10 ppb → more restrictive than BIS specification.
- 15 ppb → not the BIS-specified limit.
- 50 ppb → excessively permissive; beyond safe limits.
📚 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.
