Guidance For Governments On Prioritizing Hazards in Feed: CAC/GL 81-2013
Guidance For Governments On Prioritizing Hazards in Feed: CAC/GL 81-2013
Guidance For Governments On Prioritizing Hazards in Feed: CAC/GL 81-2013
CAC/GL 81-2013
INTRODUCTION
1. Hazard prioritization is part of the risk management process within the risk analysis framework.
2. The purpose of prioritizing hazards in feed as described in this document is to contribute to the safety of edible products
by optimizing allocation of the resources required for risk assessment and risk management.
SCOPE
3. This document provides guidance to governments on prioritizing hazards in feed and feed ingredients 1 using the multi-
criteria analysis approach. However, it is recognized that other approaches to prioritize hazards might be used.
4. This guidance is applicable to all hazards in the feed of food-producing animals which may adversely affect human
health. Agents which may adversely affect animal health but which have no impact on food safety are not considered in this
guidance, as they are not within the scope of the Codex Alimentarius.
5. Direct human exposure to hazards in feed, for example occupational exposure during feed production and processing, is
not considered, as it is not within the scope of the Codex Alimentarius.
DEFINITIONS
6. The following definitions are included to establish a common understanding of the terms used in this guidance.
Biotransformation product: Product resulting from the transformation of a chemical or biological agent in the body of the food-
producing animal (e.g. via metabolic processes).
Contaminant: Any substance not intentionally added to food or feed for food producing animals, which is present in such food
or feed as a result of the production (including operations carried out in crop husbandry, animal husbandry and veterinary
medicine), manufacture, processing, preparation, treatment, packing, packaging, transport or holding of such food or feed, or as
a result of environmental contamination. The term does not include insect fragments, rodent hairs and other extraneous matter.2
Cross-contamination: Contamination of a material or product with another material or product, including contamination
originating from the previous use of equipment.
Edible product: Any tissue or product from a food-producing animal which is intended for human consumption, including for
example meat, fish, eggs and milk.
Feed (Feedingstuff): Any single or multiple materials, whether processed, semi-processed or raw, which is intended to be fed
directly to food-producing animals.3
Feed additive: Any intentionally added ingredient not normally consumed as feed by itself, whether or not it has nutritional
value, that affects the characteristics of feed or animal products. Micro- organisms, enzymes, acidity regulators, trace elements,
vitamins and other products fall within the scope of this definition depending on the purpose of use and method of
administration.3
Feed ingredient: A component part or constituent of any combination or mixture making up a feed, whether or not it has a
nutritional value in the animal’s diet, including feed additives. Ingredients are of plant, animal or aquatic origin, or other organic
or inorganic substances.3
Food: means any substance, whether processed, semi-processed or raw, which is intended for human consumption, and
includes drink, chewing gum and any substance which have been used in the manufacture, preparation or treatment of “food”
but does not include cosmetics or tobacco or substances used only as drugs.2
Hazard: A biological, chemical or physical agent in, or condition of, food with the potential to cause an adverse health effect.2 In
this guidance, it refers to an agent in feed which has the potential to cause an adverse human health effect after transfer into an
edible product.
Medicated feed: Any feed which contains veterinary drugs as defined in the Codex Alimentarius Commission Procedural
Manual.3
1
Throughout this document the term “feed” refers to both feed and feed ingredients, unless otherwise stated
2
Codex Alimentarius Commission: Procedural Manual
3
Code of Practice on Good Animal Feeding (CAC/RCP 54-2004)
CAC/GL 81-2013 2
Processing Aid: Any substance or material, not including apparatus or utensils, and not consumed as a food ingredient by
itself, intentionally used in the processing of raw materials, food or food ingredients, to fulfill a certain technological purpose
during treatment or processing and which may result in the non-intentional but unavoidable presence of residues or derivatives
in the final product.2 (In this guidance this definition applies to feed and feed ingredients).
Risk: A function of the probability of an adverse health effect and the severity of that effect, consequential to a hazard(s) in
food.2 In this guidance, it may also refer to the probability that a hazard in feed eaten by a food-producing animal will transfer to
an edible product at a level which may cause an adverse health effect in humans.
Risk analysis: A process consisting of three components: risk assessment, risk management and risk communication.2
Risk assessment: A scientifically based process consisting of the following steps: (i) hazard identification, (ii) hazard
characterization, (iii) exposure assessment, and (iv) risk characterization.2
Risk characterization: The qualitative and/or quantitative estimation, including attendant uncertainties, of the probability of
occurrence and severity of known or potential adverse health effects in a given population based on hazard identification, hazard
characterization and exposure assessment.3
Risk communication: The interactive exchange of information and opinions throughout the risk analysis process concerning
risk, risk-related factors and risk perceptions, among risk assessors, risk managers, consumers, industry, the academic
community and other interested parties, including the explanation of risk assessment findings and the basis of risk management
decisions.2
Risk management: The process, distinct from risk assessment, of weighing policy alternatives, in consultation with all interested
parties, considering risk assessment and other factors relevant for the health protection of consumers and for the promotion of
fair trade practices, and, if needed, selecting appropriate prevention and control options.2
Transfer: Passing of a chemical or biological hazard (including hazardous biotransformation products) from feed of a food-
producing animal to an edible product of the animal.
Undesirable substances: Contaminants and other substances, which are present in and/or on feed and feed ingredients and
which constitute a risk to consumers’ health, including food safety related animal health issues.3
7. Risk analysis comprises three distinct but closely linked components: risk assessment, risk management, and risk
communication.2
8. Risk management comprises preliminary risk management activities (including: identification of a food safety problem
arising from feed; establishment of a risk profile; ranking of the hazard for risk assessment and risk management priority;
determination of a risk assessment policy for the conduct of the risk assessment; definition of the output form of the risk
assessment; commissioning of the risk assessment; and consideration of the possible results of the risk assessment), evaluation
of risk management options, implementation of risk management options, monitoring and review4. Prioritization of hazards in
feed is part of preliminary risk management activities but can also be undertaken at any point of the risk analysis process.
9. Annex 2 lists references that have been used when developing this document.
10. Details of the steps are described below. An example of the prioritization process based on these steps is given in
Annex 1 for illustrative purposes only.
PRIORITIZATION PROCESS
11. The prioritization process provides ranking for different combinations of hazard, feed and edible product in a risk analysis
framework. A defined prioritization process ensures transparency and repeatability, and facilitates re-evaluation when new data
are available without repeating all steps.
12. The prioritization process in this guidance comprises the following steps:
Step 1. Identification of the hazard, the feed and the edible product potentially associated with food safety problems.
Step 2. Identification and definition of the criteria by which each selected hazard/feed/edible product combination will
be quantified.
Step 6. Combining the weighted normalized values for each hazard/feed/edible product combination to produce a
score, and ranking of the scores to obtain the order of priority.
4
Working Principles for Risk Analysis for Food Safety for Application by Governments (CAC/GL 62-2007)
CAC/GL 81-2013 3
STEP 1. IDENTIFICATION OF THE HAZARD, THE FEED AND THE EDIBLE PRODUCT POTENTIALLY ASSOCIATED WITH FOOD SAFETY
PROBLEMS
13. In this initial screening step, the risk manager identifies hazard/feed/edible product combinations which are potentially
associated with food safety problems, and which may need to be prioritized for risk assessment and risk management. Further
guidance on risk assessment of feed is provided in the Guidelines on Application of Risk Assessment for Feed.
14. Useful information on the presence of the hazard in feed and/or edible product may be obtained from existing risk
profiles and risk assessments, and from regulatory surveillance programs/data, published data from government agencies and
scientific peer-reviewed publications, and from international programs such as the WHO Global Environment Monitoring System
(GEMS/Food); the Joint FAO/WHO International Food Safety Authorities Network (INFOSAN) (references in Annex 3); and
other reliable rapid alert systems, and industry self-monitoring programs.
15. Information which may be useful includes:
Descriptions of the hazard, the feed and edible product;
Description of the food safety problem potentially associated with the hazard/feed/edible product combination;
Chemical or biological characteristics and toxicology profile of the hazard;
Levels of hazard in feed and edible products;
Possible sources of hazard during production, processing, packing, packaging, transport, storage and use;
Relevant legislation;
Information on economic impact;
Information on knowledge gaps.
16. If the data obtained in this step indicate that the association of a specific hazard/feed/edible product combination with a
food safety problem is negligible, it may be decided to exclude that combination from further steps. Such screening should use
defined exclusion/inclusion decision rules (for example, no occurrence in the area under consideration during a given time-
frame).
17. Examples of hazards with potential relevance for human health are given in
http://www.fao.org/ag/againfo/home/en/news_archive/2013_Feed_and_food_safety.html.
STEP 2. IDENTIFICATION AND DEFINITION OF THE CRITERIA BY WHICH EACH SELECTED HAZARD/FEED/EDIBLE PRODUCT COMBINATION
WILL BE QUANTIFIED
18. The criteria to be used to prioritize the hazard/feed/edible product combinations should be relevant and reflect the
purpose of the prioritization.
19. Criteria which could be considered include those related to the extent of occurrence of a hazard in feed and edible
product, effects on human health, and other legitimate factors relevant for the health protection of consumers and for the
promotion of fair practices in food trade.
20. Each criterion should be defined so that there is no ambiguity in interpretation and so that it can be described
quantitatively (e.g. number of illnesses, concentration of a hazard). Semi-quantitative descriptions (e.g. low, medium, high)
should be clearly explained.
21. Identification and definition of the criteria should be done with the assistance of experts.
STEP 6. COMBINING THE WEIGHTED NORMALIZED VALUES FOR EACH HAZARD/FEED/EDIBLE PRODUCT COMBINATION TO PRODUCE A
SCORE, AND RANKING OF THE SCORES TO OBTAIN THE ORDER OF PRIORITY
27. For each hazard/feed/edible product combination, the weighted normalized values are combined to obtain a score, e.g.
(C1*W1)+(C2*W2)+...(Cn*Wn), where C are the normalized criteria values and W are the criteria weights.
28. Ranking of the scores of each of the hazard/feed/edible product combinations yields the prioritized list, which reflects
both the normalized criteria values and the weighting of the criteria.
CAC/GL 81-2013 4
29. It is important to demonstrate the influence of any assumptions used in the ranking process. This could be done for
example by using sensitivity analyses (e.g. weighting all criteria equally or weighting which reflects the relative importance of
each criterion).
ANNEX 1
The following is a fictitious example, which is intended only to illustrate the steps in the prioritization process. This example uses
applicable but not exhaustive criteria and the values used are illustrative. In a real-life situation, details of the process,
particularly the criteria definitions, quantification, normalization of the values and weighting of the criteria, must be dev eloped on
a case-by-case basis in consultation with experts.
STEP 1. IDENTIFICATION OF THE HAZARD, THE FEED AND THE EDIBLE PRODUCT POTENTIALLY ASSOCIATED WITH FOOD SAFETY
PROBLEMS
For simplicity, this example uses only three hazard/feed/edible product combinations ("combinations 1, 2 and 3") to demonstrate
the prioritization procedure. The process is however primarily intended to be used with a larger number of combinations.
STEP 2. IDENTIFICATION AND DEFINITION OF THE CRITERIA BY WHICH EACH SELECTED HAZARD/FEED/EDIBLE PRODUCT COMBINATION
WILL BE QUANTIFIED
This example uses four criteria (C1-C4). The descriptions/definitions of these criteria are briefly summarized in Table 1.
Table 1: Criteria chosen for this example
Criterion Description/definition
C1. Occurrence level in feed % of feed samples exceeding a defined level for the hazard
C2. Transfer from feed to edible product %, based on measurement or modeling
C3(a) Toxicity of chemical hazard (a) Health-based guidance value (e.g. ADI5 or TDI6)
or
C3(b) Health effects of biological hazard (b) Number of hazard-related illnesses
C4. Impact on feed availability Replacement feed available (easy, difficult, impossible)
5
Acceptable Daily Intake (ADI)
6
Tolerable Daily Intake (TDI)
CAC/GL 81-2013 6
STEP 6. COMBINING THE WEIGHTED NORMALIZED VALUES FOR EACH HAZARD/FEED/EDIBLE PRODUCT COMBINATION TO PRODUCE A
SCORE, AND RANKING OF THE SCORES TO OBTAIN THE ORDER OF PRIORITY
The score for each hazard/feed/edible product combination in this example is calculated using the following equation:
Score = C1*W1 + C2*W2 + C3(a or b)*W3 + C4*W4
where C are the combination-specific normalized values and W are the criteria weightings.
An example of the calculation of the score for one hazard/feed/edible product combination is shown in Table 4.
Table 4: Example of scoring of a hazard/feed/edible product combination for Combination 1 (for a chemical hazard)
<1 µg/kg
C3(a). Health hazard 1.0 30% 0.3
bw /day
Score 0.5
Combination 1 0.5 2
Combination 2 0.475 3
Combination 3 0.75 1
ANNEX 2
ADDITIONAL REFERENCES