The researchers tested to see if bacteria on shoes would transfer to the tile floors in a house. More than 90 percent of the time it did. Carpeting harbors bacteria even more. "GMA's" test results ...

And here's the, ahem, kicker: The transfer rate bacteria from shoes to clean tiles was 90% to 99%. Bacteria found on the footwear included E. coli, a source of urinary tract infections and ...