All Enterobacteriaceae are:

Facultative anaerobe, non-spore-forming glucose fermenters.

Salmonella/Escherichia/Shigella species may look the same under the microscope, but they can be separated into different many serotypes according to the variations of the antigens found on their surface.

Klebsiella are hydrogen sulfide (+).

Klebsiella, Citrobacter, Proteus can tolerate potassium cyanide.

Identification of the pathognomonic Mickulicz cells from tissue samples signify the presence of:

Enterobacter species that is found in respiratory samples and is rarely isolated from blood cultures.

Produces prodigiosin at room temperature.

Providencia species are lactose-positive, deaminase positive, H2S-negative, and motile

Plesiomonas shigelloides possess a capsule and are motile.