http://www.countertopspecialty.com/counter-tops-materials.html
Bacteria Silestone also states their product resists bacteria while granite "harbors" bacteria. This is totally false. Countertop "cleanability" studies prove that both granite and quartz are among the safest and cleanest counter tops materials on the market today, but one isn't superior to the other. The study comparing granite, marble and quartz surfaces concluded: All surfaces easily met the general FDA criteria for sanitizing... Overall, there was no statistical difference in reduction after wash and rinse for any of the four surfaces. This indicates that the differences in surfaces as discussed in the introduction did not make a significant food safety difference in cleanability. (Hospitality Institute of Technology and Management, 2006)
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