Strain no. Nutrition Colony color Temperature Growth of colony Shape of colony Margin Elevation Density Gram nature
P1 Heterotrophes White Optimum Abundant Circular Undulate Flat Translucent Gram + ve Bacilli 
P2 Heterotrophes White Optimum Moderate Circular Undulate Flat Translucent Gram + ve Bacilli
P3 Heterotrophes White Optimum Moderate Circular Undulate Flat Translucent Gram + ve Bacilli
P4 Heterotrophes White Optimum Slight Circular Undulate Flat Translucent Gram + ve Bacilli
Table 3: Colony characteristics of bacterial isolates.