FIG. 1.

Survival curves of E. amylovora strain CFBP1430 over 9 months in AB mineral medium without copper (white) or with different copper concentrations: 0.005 mM Cu²⁺ (light gray), 0.01 mM Cu²⁺ (dark gray), and 0.05 mM Cu²⁺ (black). (A) Total cell counts (squares); (B) viable cell counts (triangles); (C) culturable cell counts (circles). Total and viable cell counts were determined by epifluorescence using the LIVE/DEAD kit (Molecular Probes), and culturable cell counts were determined by plating on King's B nonselective solid medium. The minimum standard deviation was 0.014, and the maximum was 0.789.