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  • Wooden Cutting boards vs Plastic

    Besides being better for knife blades, looks like wooden wins! Who would have thought that the good old days of yesteryear were better than todays modern technology

    PLASTIC AND WOODEN CUTTING BOARDS

    Dean O. Cliver, Ph.D

    We began our research comparing plastic and wooden cutting boards after the U.S. Department of Agriculture told us they had no scientific evidence to support their recommendation that plastic, rather than wooden cutting boards be used in home kitchens. Then and since, the U.S. Department of Agriculture's Meat and Poultry Inspection Manual (official regulations) and the U.S. Food and Drug Administration's 1999 Food Code (recommended regulations for restaurants and retail food sales in the various states of the U.S.) permit use of cutting boards made of maple or similar close-grained hardwood. They do not specifically authorize acceptable plastic materials, nor do they specify how plastic surfaces must be maintained.


    Our research was first intended to develop means of disinfecting wooden cutting surfaces at home, so that they would be almost as safe as plastics. Our safety concern was that bacteria such as Escherichia coli O157:H7 and Salmonella, which might contaminate a work surface when raw meat was being prepared, ought not remain on the surface to contaminate other foods that might be eaten without further cooking. We soon found that disease bacteria such as these were not recoverable from wooden surfaces in a short time after they were applied, unless very large numbers were used. New plastic surfaces allowed the bacteria to persist, but were easily cleaned and disinfected. However, wooden boards that had been used and had many knife cuts acted almost the same as new wood, whereas plastic surfaces that were knife-scarred were impossible to clean and disinfect manually, especially when food residues such as chicken fat were present. Scanning electron micrographs revealed highly significant damage to plastic surfaces from knife cuts.


    Although the bacteria that have disappeared from the wood surfaces are found alive inside the wood for some time after application, they evidently do not multiply, and they gradually die. They can be detected only by splitting or gouging the wood or by forcing water completely through from one surface to the other. If a sharp knife is used to cut into the work surfaces after used plastic or wood has been contaminated with bacteria and cleaned manually, more bacteria are recovered from a used plastic surface than from a used wood surface.


    "Manual cleaning" in our experiments has been done with a sponge, hot tapwater, and liquid dishwashing detergent. Mechanical cleaning with a dishwashing machine can be done successfully with plastic surfaces (even if knife-scarred) and wooden boards especially made for this. Wooden boards, but not plastics, that are small enough to fit into a microwave oven can be disinfected rapidly, but care must be used to prevent overheating. Work surfaces that have been cleaned can be disinfected with bleach (sodium hypochlorite) solutions; this disinfection is reliable only if cleaning has been done successfully.


    The experiments described have been conducted with more than 10 species of hardwoods and with 4 plastic polymers, as well as hard rubber. Because we found essentially no differences among the tested wood species, not all combinations of bacteria and wood were tested, nor were all combinations of bacteria and plastics or hard rubber. Bacteria tested, in addition to those named above, include Campylobacter jejuni, Listeria monocytogenes, and Staphylococcus aureus.


    We believe that the experiments were designed to be properly representative of conditions in a home kitchen. They may or may not be applicable to other plastic and wooden food contact surfaces or to cutting boards in commercial food processing or food service operations, but we have no reason to believe that they are not relevant, except that not all plastic surfaces are subject to knife-scarring. Before our first studies had been published, they were criticized incorrectly for not having included used (knife-scarred) cutting surfaces. We had been careful to include used surfaces, and so were surprised that others who did later experiments and claimed to have refuted our findings often had used only new plastic and wood. Although some established scientific laboratories say their results differ from ours, we have received multiple communications from school children who have done science projects that have reached essentially the same conclusions that we did.


    We have no commercial relationships to any company making cutting boards or other food preparation utensils. We have tested boards and cleaning and disinfection products, some of which were supplied to us gratis. We have not tested all of the products that have been sent to us, simply because there is not time. We are aware that there are other food preparation surfaces made of glass or of stainless steel; we have done very little with these because they are quite destructive of the sharp cutting edges of knives, and therefore introduce another class of hazard to the kitchen. We believe, on the basis of our published and to-be-published research, that food can be prepared safely on wooden cutting surfaces and that plastic cutting surfaces present some disadvantages that had been overlooked until we found them.


    In addition to our laboratory research on this subject, we learned after arriving in California in June of 1995 that a case-control study of sporadic salmonellosis had been done in this region and included cutting boards among many risk factors assessed (Kass, P.H., et al., Disease determinants of sporadic salmonellosis in four northern California counties: a case control study of older children and adults. Ann. Epidemiol. 2:683-696, 1992.). The project had been conducted before our work began. It revealed that those using wooden cutting boards in their home kitchens were less than half as likely as average to contract salmonellosis (odds ratio 0.42, 95% confidence interval 0.22-0.81), those using synthetic (plastic or glass) cutting boards were about twice as likely as average to contract salmonellosis (O.R. 1.99, C.I. 1.03-3.85); and the effect of cleaning the board regularly after preparing meat on it was not statistically significant (O.R. 1.20, C.I. 0.54-2.68). We know of no similar research that has been done anywhere, so we regard it as the best epidemiological evidence available to date that wooden cutting boards are not a hazard to human health, but plastic cutting boards may be.
    Silence in the face of evil is itself evil: God will not hold us guiltless. Not to speak is to speak. Not to act is to act.”
    Dietrich Bonhoeffer

  • #2
    Wooden Cutting boards vs Plastic

    That's very interesting. Thanks.
    The problem with quotes on the Internet is that often it's difficult to verify their authenticity.
    Abraham Lincoln

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    • #3
      Wooden Cutting boards vs Plastic

      I was suspicious that this would eventually be found to be the answer to the cutting board question.
      quam minimum credula postero

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      • #4
        Wooden Cutting boards vs Plastic

        Wood is best, imo. Then again, I don't cut raw meat on mine, so I really don't worry much about the little nasties making us sick. The one problem I do have with wood, even the end grain ones seem to split rather easily after being washed. I keep them pretty well oiled, and dry immediately after washing, but they still split. Anyone got any suggestions?
        Liberty is NOT a privilege, it is a RIGHT

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        • #5
          Wooden Cutting boards vs Plastic

          Yea, use plastic they dont split

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          • #6
            Wooden Cutting boards vs Plastic

            I like plastic cutting boards because you can use them for making the center of a dipole antenna ,they are also dishwasher safe .

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            • #7
              Wooden Cutting boards vs Plastic

              I use all plastic cutting sheets like these
              http://www.webstaurantstore.com/tablecraft-fcb1824a-18-x-24-flexible-cutting-board-set/808FCB1824A%20ASST.html?utm_source=Amazon

              I can have one for meat like chicken and one for vegies and keep them seperated when cooking. They "curl up" to allow you to pour the contents into a bowl or pan.

              They are dishwasher safe and having multipe ones like this set allows you to not have to wash between different food for the same meal.

              http://www.amazon.com/MIU-Flexible-Cutting-Board-Set/dp/B00011RTE8/ref=pd_sbs_k_2

              http://www.amazon.com/MIU-France-Flexible-Cutting-Boards/dp/B003OA4QM6/ref=pd_sbs_k_4

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              • #8
                Wooden Cutting boards vs Plastic

                I just use one of those white plastic ones that's white. Well, I have a few but yeah. They may hold bacteria but I just put them in the dishwasher so they get cleaned well. I just use the sanitize button. Not sure what it does. I think it steams them. All I know is I'm always opening the dishwasher and getting a face full of steam. But yeah, plastic is much better. I don't like wooden handled knives either. Or wooden knife blocks. They're disgusting. I have a magnetic strip that holds knives. I'm ranting, lol. I'm done now.

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