Figure 3.

CFU per swab of the 23 selected SPaCE pathogens grown on the porcine wound at 37 °C for 24 h (inset photos: respective SPaCE tubes showing fluorescent activation after inoculation with the swabs at 37 °C for 2 h). Swabs carrying the relatively lower biofilm cell count (i.e., ≤10⁷ CFU/swab) are linked to a relatively weaker fluorescent signal (such as P. aeruginosa (734) and E. faecalis (51 and 52) strains, above), demonstrating the cell density-dependent activation of SPaCE swab sensor.