•Kitsunezaki has developed a density dependent model that divides bacteria based on their motility properties: active or inactive. [4]
•Mimura, Sakaguchi, and Matsushita account for the motility rate of the active bacteria, the diffusion rate of nutrients, the growth rate of the bacteria, and the rate of conversion of active bacteria into inactive bacteria. By varying the agar and nutrient concentrations, they obtain four different colony patterns. [4]
•Mendelson, Bourque, Wilkening, Anderson, Watkins, and Salhi have described the dynamics of the bacteria as interconnected levels of coordination that result in superpatterns which expend the colony edge. [2,3]
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