Figure 1).

A total of 243 adonitol-positive specimens were excluded as possibly containing Klebsiella oxytoca by a sequential screening process that included the following tests in order: spot indole, growth in differential biochemicals (motility-indole-ornithine, triple sugar iron and phenylalanine deaminase media), and speciation by Vitek 1. The bars shown here represent the proportion of these 243 specimens that were excluded at each step of the screen