A total of 150 isolates of Staphylococcus aureus were subjected to the tests on the API Staph system. Of
these, 50 were also tested by conventional methods, using the same tests as those found on the API Staph strips.
Applying the principles of numerical taxonomy, the relationship between these isolates was 82 % and more.
Tests for the metabolism of sucrose and N-acetyl-glucosamine and for the production of argenine dihydrolysate
and urease appear to be superfluous in the identification of S. aureus in this system.
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