METHODS OF MEASURING ANTIBIOTIC ACTIVITY 



79 



Figure 8. Daily standard curve of streptomycin on streptomycin assay agar, 

 incubation 30° C. From Loo et al, (582). 



partial Inhibition of growth be measured and, from this, the concentra- 

 tion of the active substance be calculated in a manner similar to the 

 measurement of the potency of bactericidal agents. Partial inhibition 

 can be determined by plating for the number of viable bacteria, as com- 



