Klebsiella oxytoca
is actually a complex of nine species—
Klebsiella grimontii
,
Klebsiella huaxiensis
,
Klebsiella michiganensis
,
K. oxytoca
,
Klebsiella pasteurii
,
Klebsiella spallanzanii
, and three unnamed novel species. Phenotypic tests can assign isolates to the complex, but precise species identification requires genome-based analysis.