In comparison to other members of the family Enterobacteriaceae
, Cronobacter strains seem to be more susceptible against so-called "key access antibiotics" of the World Health Organization's Model List of Essential Medicines (25), such as ampicillin, aminoglycosides, chloramphenicol, and third-generation cephalosporins (the last is included in the List of Essential Medicines only for specific, limited indications) (26).
Detection of extended-spectrum beta-lactamases in members of the family Enterobacteriaceae
: comparison of the double-disk and three-dimensional tests.
 Genes for Amp-C [beta]-lactamases are commonly found on the chromosomes of the several members of the family Enterobacteriaceae
including Enterobacter, Shigella, Providencia, Citrobacter freundii, Morganella morganii, Serratia marcescens and Escherichia coli.
Genes for AmpC b-lactamases are encoded on the chromosomes of several members of the family enterobacteriaceae
. Plasmid mediated AmpC b-lactamases are thought to have originated from chromosomes of several enterobacteriaceae species and are infrequently inducible.4 Plasmids carrying genes for AmpC b-lactamases often carry multiple resistant genes, including genes for resistance to aminoglycosides, quinolones, chloramphenicol, sulfonamide, tetracycline, and trimethoprim as well as genes for other b-lactamases such as CTX-M-3.5 AmpC enzymes are located in periplasm, typically having molecular mass of 34 to 40 kDa and isoelectric points of >8.0.4 Plasmids with these genes can spread among members of the family Enterobacteriaceae
and have been documented in many countries.6
Pantoea agglomerans is a gram-negative aerobic bacillus that belongs to the family Enterobacteriaceae
. It is primarily an environmental and agricultural organism that inhabits plants, soil, and water.
The colonies cultivated on XLDagar were identified using commercial Mini Kits containing Rugai medium with lysine, which is used mainly in biochemical screening of colonies grown on media selective for Gram-negative bacteria of the family Enterobacteriaceae
. A fresh Rugai medium with lysine was employed separately for each different colony grown on XLDagar in order to identify each bacterial genus or species, as recommended by the manufacturer (Oplustil, 2004).
In the family Enterobacteriaceae
, a general resistance pattern was found for ampicillin and cephalothin, being susceptible to these antibiotics E.
Salmonella is a genus in the family Enterobacteriaceae
which are Gram-negative, oxidase negative, catalase positive, nonspore forming rods.
Kluyvera is a group of Gram-negative rods bacteria and a member of the family Enterobacteriaceae
Enterobacter is a genus of common Gram-negative facultatively-anaerobic rod-shaped bacteria of the family Enterobacteriaceae
. The important members of this family are Escherichia coli Salmonella Shigella and Klebsiella.
The Gram-negative organisms isolated in this study were predominantly of the family Enterobacteriaceae
. The absence of E.
(8) The isolates showed phenotypic characteristics that supported the suggestion that the organism belonged in the family Enterobacteriaceae
. (8) The genera Citrobacter, Hafnia, Serratia, and Klebsiella were ruled out due to several characteristics of the organism, including motility, lack of capsulation, gelatin hydrolysis, and production of lipase, urease, and deoxyribonuclease.