Detection and evaluation of microbial subsets (emergence III).

When only culture-positive data were analyzed (including observations collected from cows previously E. coli-positive), dimensionless indicators distinguished, with perpendicular data inflections, three non-overlapping subsets (A). One of such subsets was devoid of S. aureus+ observations, but predominantly composed of observations collected from previously E. coli-positive animals. When validated, such subset revealed higher M/L ratio values than the remaining subsets (B). The two other subsets differed in their L % values (B).