Chemical Residue And Animal Fibers

Question 1

Chemical residues in foodstuffs of animal origin
Chemical residues can be found in the following:

Answer 1

1. Animal tissues.
2. Milk and eggs after the administration of Veterinary drugs and
   medicated premixes.
3. Application of pesticides to animals
4. Consumption of stock feeds previously treated with agricultural
   chemicals

Question 2

Residues from

Answer 2

Veterinary drugs
Medicated feeds
Applications of pesticides

Question 3

Veterinary drug intended for administration to food – producing
animals, an additional consideration is the safety of the products derived from
treated animals for human consumption.
What are these considerations?

Answer 3

1. MRL – Maximum Residue Limites
2. Withdrawal periods

Question 4

Residue programs consists of the following;

Answer 4

1. Monitoring
2. Surveillance

Question 5

This randomly samples tissues from animals at slaughter.
Tissue samples are assayed for veterinary drugs, pesticides and
environmental contaminants and the residue are assessed for
compliance with the applicable MRL or environmental standard.

Question 6

By comparison, sample tissues from animals suspected
of violative residues on the basis of clinical signs or herd history.
Animals identified with violative residues of veterinary drugs of
pesticides do not enter the food chain.

Question 7

KEY PARAMETERS DERIVED IN THE SAFETY AND RESIDUE
EVALUATUIONS

Answer 7

1. ADI ( ACCEPTABLE DAILY INTAKE)
2. Safe concentration
3. MRL or tolerance
4. Target tissue
5. Withdrawal time

Question 8

– amount of veterinary drug, expressed
on a body weight basis, that can be ingested daily over a lifetime
without an appreciable risk to human health.

Answer 8

ADI

Question 9

maximal allowable concentration of total
residues of toxicologic concern in edible tissue.
The safe concentration
is calculated from the ADI and considers the weight of an average
person and the amount of the meat, milk and eggs consumed daily by
a high consuming individual.

Answer 9

Safe Concentration

Question 10

maximal consideration of residue resulting from
the use of veterinary drug ( expressed in mg/kg or ug/kg on a fresh
weight basis) that is legally permitted as acceptable in or on a food.

Answer 10

MRL OR TOLERANCE

Question 11

Affect wool production.

Answer 11

Files, lice, keds and mites

Question 11

have been
the mainstay for managing infestations for these parasites.

Answer 11

Ectoparasiticides

Question 11

Products types and chemical groups used:

Answer 11

1.Spray on products containing insect growth regulators.
2. organophosphate pesticides
3. short wool plunge or shower dips
4. magnesium fluorosilicate

Question 11

– the edible tissue with residues that deplete to a
concentration below the MRL at a slower rate compared with other
edible tissues. The target tissue is frequently the liver or the kidney.

Answer 11

target tissue

Question 11

Pesticides residues in wool are influenced by many factors;

Answer 11

1. Chemical and formulation used
2. Method of application
3. Rate and timing of the chemical application
4. Length of wool at the time of application

Question 11

the period of time between the last administration
of a drug and the collection of edible tissue or products from a treated
animal that ensures the total residues deplete to below the safe
concentration, and the marker residue depletes to below the MRL.

Answer 11

Withdrawal time

Question 15

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