North Carolina State University biologist Rob Dunn and colleagues surveyed people's pillow cases, refrigerators, toilet seats, TV screens and other household spots, to learn about the microbes that dwell in our homes. Among the findings, reported in the journal PLoS One, homes with dogs had more diverse bacterial communities, and higher numbers of "dog-associated" bacteria.
Source: http://www.npr.org/2013/05/24/186450897/having-a-dog-may-mean-having-extra-microbes?ft=1&f=1007
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