Macromorphological characteristics of Rhodococcus members
A – circular, entire, convex, smooth, orange pigmented and shiny colonies of R. ruber IEGM 72; B – echinulate (single-line streak) growth pattern of R. ruber IEGM 72 and IEGM 628 in the presence of cholesterol; C – filiform growth pattern of R. ruber IEGM 230 on nutrient agar slants, D – filiform (single-line streak) growth pattern of Rhodococcus spp. on nutrient agar slants