In order to ensure valid outcomes when data is log transformed, the minimal value of measurement is set to 1 resulting in 0 log10 following transformation. A duplicate mean of <1 colony forming units (CFU)/plate is set to 0 log10 as a result. The sensitivity of the spread plate analysis may be lacking in distinguishing between 0 and 1 CFU and merging these values as a common flooring value of log10 = 0 may therefore be appropriate.