Experiment
1, the bacterial suspension equivalent was 1.2 × 108 colony
forming units per mL (CFUs/mL) and for Experiment 2, the bacterial
suspension equivalent was 6.0 × 107. In brief, F. columnare isolate LV-
359-01 (a genomovar II isolate; Beck et al., 2012) was streaked on
Ordals' Medium (Anacker and Ordal, 1959). After 48 h, the isolate was
dislodged from the agar using a sterile cotton swab and inoculated
into 5 mL of F. columnare Growth Medium (FCGM; Farmer, 2004). This
suspension was incubated at 28 °C for 24 h and was used to inoculate
1 L of FCGM. The inoculated 1-L broth was incubated for up to 24 h at
28 °C in an orbital-shaker incubator set at 200 rpm; when the bacterial
growth reached an absorbance of 0.85 at 550nm, the flaskwas removed
and placed on a stir plate at room temperature