media types, including chocolate agar and Thayer–Martin medium with appropriate additives as noted above. Attempted isolation on MacConkey agar is not reliable or generally successful. After 24 hours of incubation on appropriate solid media, Francisella'' colonies are generally small (1 to 2 mm), opaque, and white-gray to bluish-gray in color. Colonies are smooth, with clean edges and, after a 48 hours of growth, tend to have a shiny surface. References External links Francisella genomes and related information at PATRIC, a Bioinformatics Resource Center funded by NIAID Francisella in Cod Thiotrichales Bacteria genera