The latest issue of WIRED magazine has an infopr0n column that shows the relative strength of bacteria at different anatomic locations.
In med-surg we are studying urinary tract right now. Want to know why foley caths get infected so easily? See orange at right [click for larger image]. Also, notice that the numbers being used here are phylotypes, not species. The intestinal tract has something like 400-500 species of bacteria, most of which haven't been definitely ID'd yet. Pretty amazing.
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