The Order Enterobacterales

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The page below is a sample from the LabCE course Medical Microbiology Taxonomy and Nomenclature. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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The Order Enterobacterales

Major changes in taxonomic classification have occurred over the past few years. The following pages exhibit several notable examples.
Below is an example of a recent major revision. The order Enterobacterales (formerly Enterobacteriaceae) now includes these families, and several representative genera have been provided:27
OrderEnterobacterales
FamilyEnterobacteriaceaeErwiniaceaePectobacteriaceaeYersiniaceaeHafniaceaeMorganellaceaeBudviciaceae
Genus
(Example genera included)		Escherichia
Enterobacter
Citrobacter
Klebsiella
Salmonella
Shigella		Erwinia
Pantoea
Buchnera
Phaseolibacter
Tatumelia
Wigglesworthia 		Pectobacterium
Brenneria
Dickeya
Lonsdalea
Sodalis 		Yersinia
Chania
Ewingella
Rahnella
Rouxiella
Samsonia
Serratia		Hafnia
Edwardsiella
Obesumbacterium 		Morganella
Proteus
Providencia
Photohabdus
Xenorhabdus 		Budvicia
Leminorella
Pragia
The order Enterobacterales contains >250 species.
27. Prinzi, A. M., & Moore, N. M. (2023). Change of plans: overview of bacterial taxonomy, recent changes of medical importance, and potential areas of impact. Open Forum Infectious Diseases, 10(7), ofad269. https://doi.org/10.1093/ofid/ofad269

Figure 3. Order Enterobacterales and its families