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Enterobacter is a genus of common Gram-negative, facultatively anaerobic, rod-shaped, non-spore-forming bacteria of the family Enterobacteriaceae. It is the type genus of the order Enterobacterales.[1] Several strains of these bacteria are pathogenic and cause opportunistic infections in immunocompromised (usually hospitalized) hosts and in those who are on mechanical ventilation. The urinary and respiratory tracts are the most common sites of infection. The genus Enterobacter is a member of the coliform group of bacteria. It does not belong to the fecal coliforms (or thermotolerant coliforms) group of bacteria, unlike Escherichia coli, because it is incapable of growth at 44.5 °C in the presence of bile salts.[citation needed] Some of them show quorum sensing properties.[2][3]

Quick facts: Enterobacter, Scientific classification , Spe...
Enterobacter cloacae on trypticase soy agar
Scientific classification e
Domain: Bacteria
Phylum: Pseudomonadota
Class: Gammaproteobacteria
Order: Enterobacterales
Family: Enterobacteriaceae
Genus: Enterobacter
Hormaeche & Edwards 1960

E. amnigenus
E. arachidis
E. asburiae
E. bugandensis
E. cancerogenous
E. cloacae
E. cowanii
E. dissolvens
E. gergoviae
E. helveticus
E. hormaechei
E. intermedius
E. kobei
E. ludwigii
E. mori
E. nimipressuralis
E. oryzae
E. pulveris
E. pyrinus
E. radicincitans
E. taylorae
E. turicensis
E. soli


Cloaca Castellani & Chalmers, 1919
Aerobacter Hormaeche & Edwards, 1958


One clinically important species from this genus is E. cloacae.

Researchers in 2018 reported, after detecting the presence on the International Space Station (ISS) of five Enterobacter bugandensis bacterial strains, none pathogenic to humans, that microorganisms on ISS should be carefully monitored to continue assuring a medically healthy environment for the astronauts.[4][5]