Figure 1.

Illustration showing the various sources and transmission routes of hypothetical built environment microbial communities. Also indicated is how these communities might contribute to the microbial ecology of indoor surfaces, as well as various abiotic factors (for example, temperature) that may influence microbial diversity.

Kelley and Gilbert Genome Biology 2013 14:202   doi:10.1186/gb-2013-14-2-202
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