The Discriminatory Power (D)
is the average probability that the typing system will assign a different type to two
unrelated strains randomly sampled in the microbial population of a given taxon.
This tool has been created to help calculate this parameter, and source code is available at biophp.org |
Reference
Hunter P. Reproducibility and indices of discriminatory power of microbial typing methods. J Clin Microbiol 1990; 28: 1903-5. PubMed. A Discriminatory Power (D) value of 1.0 would indicate that a typing method was able to distinguish each member of a strain population from all other members of that population. Conversely, an index of 0.0 would indicate that all members of a strain population were of an identical type. An index of 0.50 would mean that if one strain was chosen at random from a strain population, then there would be a 50% probability that the next strain chosen at random would be indistinguishable from the first.
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