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Enterobacteriaceae is a large family of Gram-negative bacteria. It includes over 30 genera and more than 100 species. 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 ...
Klebsiella bacteria tend to be rounder and thicker than other members of the family Enterobacteriaceae. They typically occur as straight rods with rounded or slightly pointed ends. They can be found singly, in pairs, or in short chains. Diplobacillary forms are commonly found in vivo. [6]
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 ...
Antibiotic resistance has become widespread in bacterial pathogens, and in Gram-negative bacteria such as the Enterobacteriaceae, much of this comes from acquired genes. The resistance genes encode proteins that export or inactivate β-lactam antibiotics , aminoglycosides , tetracycline , chloramphenicol , fosfomycin , etc. Plasmids carrying ...
In countries where antibiotics are over-the-counter and obtainable without a prescription, the incidence and prevalence of CRE infections were higher. One study from Japan found that 6.4% of healthy adults carried ESBL (mostly cefotaximase)-producing strains compared to 58.4% in Thailand, where antibiotics are available over the counter and ...
Delayed or suboptimal treatment often allows these kidney stones to act as a nidus for P. mirabilis growth causing recurrent infections despite antibiotic treatment. If the stones grow large enough they can cause obstruction and kidney failure. Proteus species can also cause wound infections, sepsis, and pneumonia, mostly in hospitalized ...
Also, IMViC is {+ + – -} for E. coli; as it is indole-positive (red ring) and methyl red-positive (bright red), but VP-negative (no change-colourless) and citrate-negative (no change-green colour). Tests for toxin production can use mammalian cells in tissue culture, which are rapidly killed by shiga toxin. Although sensitive and very ...
More recently, the chemistry behind enzymatic detection compounds has been updated so that the indicating component is redox active, as opposed to the more usual chromogenic format, allowing fecal indicator bacteria such as E. coli and E. faecalis to be detected electrochemically without any sample pre-treatment. Since the colour of the ...