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Enumeration of biosensor bacteria (E. coli MC4100/ pTGFP2) on LB4 containing ampicillin. Open diamonds, microcosms containing undiluted S. rimosus spore inoculum (A series); open squares, 100×-diluted spore inoculum (B series); open triangles, 10,000×-diluted spore inoculum (C series); multiplication signs, no spores added (D series).
