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Enterobacterales is an order of Gram-negative, non-spore forming, facultatively anaerobic, rod-shaped bacteria with the class Gammaproteobacteria. [1] The type genus of this order is Enterobacter . [ 1 ]
Enterobacteriaceae is a large family of Gram-negative bacteria.It includes over 30 genera and more than 100 species. Its classification above the level of family is still a subject of debate, but one classification places it in the order Enterobacterales of the class Gammaproteobacteria in the phylum Pseudomonadota.
Cultures are found in soil, water, sewage, feces and gut environments. 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.
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Enterobacter cloacae is a member of the normal gut flora of many humans and is not usually a primary pathogen. [9] Some strains have been associated with urinary tract and respiratory tract infections in immunocompromised individuals.
The genus Hafnia is one of more than 40 genera that currently comprise the order Enterobacterales.. Although Møller originally described this genus in 1954, the legitimacy of this group was constantly challenged over the next two decades, often being referred to by synonyms such as "Enterobacter alvei", "Enterobacter aerogenes subsp. hafniae" and "Enterobacter hafniae" but it is mostly ...
The enterobacterial common antigen (ECA) is a carbohydrate antigen found in the outer membrane of many Enterobacterales species. [1] The antigen is unanimously absent from other gram-negative and gram-positive bacteria. [1] Aeromonas hydrophila 209A is the only organism outside of Enterobacterales that expresses the ECA. [1]
This family is a member of the order Enterobacterales in the class Gammaproteobacteria of the phylum Pseudomonadota. [ 1 ] The name Yersiniaceae is derived from the Latin term Yersinia , referring the type genus of the family and the suffix "-aceae", an ending used to denote a family.