Enterobacter is a genus of common Gram-negative, facultatively anaerobic, rod-shaped bacteria of the family Enterobacteriaceae. 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. It is also a fecal coliform, along with Escherichia. Two clinically important species from this genus are E. aerogenes and E. cloacae.


Its laboratory characteristics are lactose positive, indole negative and urease negative and is a non fecal coliform.


1. Fourth generation of cephalosporin,a B-lactam antibiotic Cefepime 2. Imipenem (carbapenems) is of choice in enterobacter treatment. 3. Aminoglycosides such as amikacin have been found very effective as well. 4. Quinolones are an effective alternative.


In a recent study, over a 1/3 of gut bacteria in a morbidly obese volunteer was found to be Enterobacter. After 23 weeks, the volunteer lost almost 1/3 of his weight by virtually eliminating the bacteria via diet, while being prevented from exercising.

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