2- Milk residues Flashcards
3 reasons why residues occur
Withdrawal periods have not been observed
Higher doses/longer period of administration than those authorised have been administered
Illegal/unauthorised drugs have been given
What is Maximum Residue Limit?
Max concentration of a residue that is legally permitted or acceptable in or on a food
Why is the MRL (maximum residue limit) important?
To ensure the acceptable daily intake isn’t exceeded
What is Acceptable Daily Intake?
Estimate of the amount of a substance expressed on a bodyweight basis that can be ingested daily over a lifetime without appreciable risk to the consumer.
How is ADI (Acceptable daily intake) estimated?
Dividing the No effect level by an uncertainty factor to allow for variables across different species
What is the no effect level?
The maximum dose of a substance that can be consumed over a stated period without producing detectable ill effects
What is a withdrawal period?
The time for residues to deplete to below the maximum residue limit
T/F A SQP may supply an authorised veterinary medicine against a prescription from a vet
True
What is the minimum statutory withdrawal period for eggs
7 days
What is the minimum statutory withdrawal period for milk
7 days
What is the minimum statutory withdrawal period for meat
28 days
What is the purpose of residues surveillance
Monitor the levels of compliance in a country or region
Take corrective action when regular violations are discovered or when trends occur
What is the importance of testing for antibiotic residues
risk to human health- allergy, bacterial resistance- zoonotic
manufacturing process- if antimicrobials present in starter culture in yoghurt and cheese won’t work
What is the equation to work out antibiotic conc in cow milk
conc in cow milk= conc in bulk tank x ( vol in bulk tank / cow yield)
What level of antibiotic does a bulk tank positive test mean
Bulk tank positive implies at least 0.0025μg/ml
