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Cross-contamination of products can occur through these means:

  • direct – raw material and cooked material in direct contact
  • dripping – incorrect storage and packaging
  • indirect – inadequate personal hygiene or inadequate cleaning of surfaces the food contacts.

Your staff should be made aware of their responsibility to prevent cross-contamination in the workplace.

Raw material contamination

There is increased risk of the presence of food poisoning microorganisms associated with the following products

  • red meat
  • poultry
  • untreated milk
  • raw eggs
  • shellfish.

All raw food and ingredients must always be kept completely separate from ready-to-eat or cooked foods (high-risk food). Your staff should be aware that good hygiene practices must be in place to prevent any contact between raw food and cooked products; for example, the liquid from thawing foods, especially frozen poultry, must not be allowed to contaminate wiping cloths, high-risk food, or equipment used for high-risk food.

Raw materials that may contain foreign bodies, which will be undesirable in the finished product, require careful inspection prior to acceptance or must undergo specific preparation as part of the production process. For example, stones must be removed from fresh peas and fragments of walnut shells cleaned from diced walnuts.

Raw material control procedures

As a food safety manager, you should be aware of any potential chemical, physical, or biological hazards which may be present in specific raw materials. You need to have a pre-acceptance inspection system in place to assess the acceptability of raw material coming into your facility.

When you receive raw materials after the pre-acceptance inspection is done, a post-receipt inspection system must be in place to code the raw materials entering your premises so that they can be identified. This is a necessary step in preventing contamination issues later. Your traceability system should also include where and how the raw material is stored and where the raw material is eventually used.

When using raw materials, use color-coded wiping cloths and chopping boards. They are essential in preventing cross-contamination of products.

All staff must be trained in the prevention of contamination of raw material and made aware of the specific procedures in place to reduce contamination.

Product packaging

Packaging should be clean and free from contaminates such as dust. The packaging must also be stored under conditions to prevent contamination.

Indeed, packaging should be controlled in a similar way as any other raw material.

Packaging should not itself pose a hazard and should be suitable for its purpose. For example, packaging should be strong enough not to break during filling, processing, or storage.

Packaging used for the storage of raw materials is very important in preventing product contamination. There should be an appropriate barrier to prevent contact between raw materials, ingredients, and finished product.

During manufacture, any unused packaging that has been removed from its protective outer packaging should be suitably protected before being returned to storage.

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Food safety knowledge network basic level requirements. OpenStax CNX. Dec 30, 2009 Download for free at http://cnx.org/content/col11142/1.4
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