Figure S1. Morphology of Flavobacterium columnare cells during starvation in ultrapure water as determined by light microscopy. Panels A, B, and C display ATCC 23643 strain. Panels D, E, and F show ARS-1 strain. Panels G, H, I show ALG-00-530 strain. Panels J, K, and L display ALG-02-36 strain. Panels A, D, G, and J show cells at day 1; panels B, E, H, and K display 7 days starved cells; panels C, F, I, and L show 14 day starved cells. Scale bars represent 25 μm. Characteristic coiled forms are noted by arrows.