House dust microbes degrade cancer-causing chemical New research finds that household dust hosts microbes that can break down cancer-causing environmental chemicals. However, the byproducts of this degradation may also harm health. The microbes in our household dust can fight off cancer-causing chemicals, but at what cost? Our households are riddled with all kinds of microbe, some of which are good and some of which are dangerous. From our dishwashing sponges to our toothbrush holders, there are plenty of places in our homes where these tiny microorganisms can hide. In particular, the dust that settles on our furniture and other surfaces contains a wide variety of fungi, as well as bacteria from the Staphylococcus and Streptococcus families. Although such bacteria may harm our health particularly if we have a weak immune system. new research finds that the microbes present in household dust also have an additional role: They help break down harmful environmental chemicals. ...