Enterobacter cloacae bacteria

Enterobacter cloacae

Enterobacter cloacae picture enterobacter cloacae animated

Enterobacter cloacae on Endo agar with biochemical slope (see here). Glucose fermentation with gas production (fig.E), urea usually positive (about 65%) and H2S negative, lactose positive (fig.F). Sucrose, mannitol and cellobiose positive.

Enterobacter cloacae is a member of the normal gut flora of many humans and is ubiquitous in terrestrial and aquatic environments (water, sewage, soil and food). It is sometimes associated with urinary tract and respiratory tract infections (less common are intra-abdominal infections, skin and soft tissue infections, endocarditis, meningitis, arthritis and osteomylitis). E.cloacae infections tend to occur in people with a weakened immune system.

Many of these infections are obtained when a person is in the hospital for some other reason (a nosocomial infection). E. cloacae tends to contaminate various medical, intravenous and other hospital devices and E.cloacae infections are endemic in some hospitals (e.g., burn units, neonatal intensive care units).

Wikipedia

Enterobacter cloacae basic characteristics

  • GRAM-NEGATIVE RODS
  • MOTILE
  • NON-SPORE-FORMING
  • CATALASE: POSITIVE
  • OXIDASE: NEGATIVE
  • FACULTATIVELY ANAEROBIC

Tests for identification of Enterobacter cloacae

MacConkey
growth
Indole
production
Methyl
red
Voges-
Proskauer
Citrate
(Simmons)
Hydrogen
sulfide(TSI)
Urea
hydrol.
Lysine
decarb.
Arginine
dihydrol.
Ornithine
decarb.
POS. NEG. NEG. POS. POS. NEG. D NEG. POS. POS.
Motility
(36 °C)
D-glucose
acid/gas
D-mannitol
ferm.
Sucrose
ferm.
Lactose
ferm.
D-sorbitol
ferm.
Cellobiose Esculin
hydrol.
Acetate
utiliz.
ONPG test
POS. POS./POS. POS. POS. POS. POS. POS. d. D POS.

Here you can compare typical test results for E.cloacae, K.pneumoniae, E.coli and S.marcescens.



Enterobacter cloacae colonies on agar cultivation media

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Useful Links

WIKIPEDIA
CDC
Antimicrobe