TABLE 1

Growth in the tailpipe connected to the P-trap colonized with GFP-expressing E. coli biofilm

Sampling areaPresence of GFP-expressing E. coli on daya:
01234567
Strainer 8 in. above P-trap water+
Tailpipe
    6 in. above P-trap water++++
    4 in. above P-trap water+++++
    2 in. above P-trap water+++++++
P-trap++++++++
  • a “−” and “+” denote the absence and presence of GFP-expressing E. coli, respectively.