What is the age threshold used to designate 30 months or older SRMs in cattle?

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Multiple Choice

What is the age threshold used to designate 30 months or older SRMs in cattle?

Explanation:
SRMs are defined based on the animal’s age to limit prion risk. For cattle, tissues are designated as SRMs once the animal reaches 30 months; that means at 30 months or older, high‑risk tissues like brain and spinal cord must be removed from the food supply. This 30‑month cutoff is used because the risk associated with prions increases with age, making older cattle more likely to carry SRMs. The other ages listed don’t set the threshold for this designation, so 30 months is the correct cutoff.

SRMs are defined based on the animal’s age to limit prion risk. For cattle, tissues are designated as SRMs once the animal reaches 30 months; that means at 30 months or older, high‑risk tissues like brain and spinal cord must be removed from the food supply. This 30‑month cutoff is used because the risk associated with prions increases with age, making older cattle more likely to carry SRMs. The other ages listed don’t set the threshold for this designation, so 30 months is the correct cutoff.

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