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2 edition of Biochemical characterization [of] citrobacter freundii and citrobacter diversus. found in the catalog.

Biochemical characterization [of] citrobacter freundii and citrobacter diversus.

W H. Ewing

Biochemical characterization [of] citrobacter freundii and citrobacter diversus.

by W H. Ewing

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Published by United States Public Health Service, Centre for Disease Control in Atlanta .
Written in English


Edition Notes

SeriesDHEW Publication No. (CDC) 76-8283
ID Numbers
Open LibraryOL20378867M

strains of Citrobacter koseri isolated from clinical specimens were studied and their biochemical reactions determined. They were examined serologically by means of a scheme consisting of 14 O antigens. The sources of the clinical specimens were tabulated. Citrobacter spp. MATERIAL SAFETY DATA SHEET - INFECTIOUS SUBSTANCES SECTION I - INFECTIOUS AGENT NAME: Citrobacter spp. SYNONYM OR CROSS REFERENCE: C. freundii, C. diversus (C. koseri), C. amalonaticus, C. Read More.

Citrobacter diversus is a gram-negative rod member of the Enterobacteriaceae family. A patient is described from whom this organism was isolated twice in pore culture from empyema fluid. Our isolates of Citrobacter diversus were resistant to ampicillin and carbenicillin and sensitive to cephalotbin. Citrobacter diversus should be distinguished from Citrobacter freundii, . Before , only three species, Citrobacter freundii, Citrobacter koseri (Citrobacter diversus), and Citrobacter amalonaticus, were recognized. C. freundii is the type species in this genus, and the later two species have been called other names.

Objective: Recently a publication of Brenner et al. introduced 11 genetically distinct species within the genus Citrobacter. These newly recognized Citrobacter species can be classified by means of their biochemical characteristics. The aim of this study was to examine the distribution and susceptibility of Citrobacter isolates in our patient s: A total of samples.   Biochemicalcharacteristics of the representative Citrobacter strains. The eight isolates were gram-negative, motive, short rods. The comparison of biochemical characteristics of the eight strains with those of some Citrobacter species in Bergey's Manual was shown in (Table 1).Biochemical characteristics of strain C1 were identical to those described for C. freundii.


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Biochemical characterization [of] citrobacter freundii and citrobacter diversus by W H. Ewing Download PDF EPUB FB2

Biochemical characterization: Citrobacter freundii and citrobacter diversus [William H Ewing] on *FREE* shipping on qualifying : William H Ewing. This chapter discusses the biochemical and serological characterization of genus Citrobacter consists of Gram-negative peritrichous rods.

The genus is subdivided into two species: (1) Citrobacter freundii (includes mostly H 2 S-positive, indole-negative, and adonitol-negative cultures) and (2) Citrobacter diversus (composed of H 2 S Cited by: 9.

cephalothin between C. diversus and indole-negative C. freundii. ADDENDUM After preparation ofthis paper, anothergroup of 25culturesofC. diversus fromclinical Biochemical characterization of Citrobacter diversus (Burkey) Werkmanand Gillen anddesignation ofthe neotype strain.

Int. Syst. Bacteriol. Frederiksen, W. Cited by: Of the dozen species, Citrobacter freundii, Citrobacter koseri (formerly Citrobacter diversus), and Citrobacter amalonaticus are linked to human disease.

They are differentiated by their ability to convert tryptophan to indole, ferment lactose, and use malonate. freundii produces hydrogen sulfide and hence can be confused with Salmonella. Genetic and biochemical characterization of Citrobacter rodentium sp.

nov. D B Schauer, B A Zabel, I F Pedraza, C M O'Hara, A G Steigerwalt, and D J Brenner Division of Toxicology, Massachusetts Institute of Technology, CambridgeUSA. M.A. Riley, in Encyclopedia of Microbiology (Third Edition), Bacteriocins of Gram-Negative Bacteria. Recent surveys of E.

coli, Salmonella enterica, Hafnia alvei, Citrobacter freundii, Klebsiella oxytoca, Klebsiella pneumoniae, and Enterobacter cloacae reveal levels Biochemical characterization [of] citrobacter freundii and citrobacter diversus. book bacteriocin production ranging from 3 to 26% of environmental isolates.

Colicins, bacteriocins produced by. Ability of commercial identification systems to identify newly recognized species of Citrobacter. J Clin Micro- biol ; 7. Schauer DB, Zabel BA, Pedraza IF, O´Hara CM, Steigerwalt AG, Brenner DJ. Genetic and biochemical characterization of Citrobacter rodentium sp.

nov. J Clin Microbiol ; 8. Biochemical Test and Identification of Citrobacter freundii. They are gram -ve, non-capsulated, non-sporing, catalase +ve, oxidase -ve bacteria. Given the difficulty that commercially available systems have in identifying different Citrobacter spp., these two authors stressed in their report the interest for a full genetic and biochemical characterization of CKO which would help to develop simple tests suitable for differentiating C.

koseri from the other H 2 S-negative Citrobacter. )ers frombothC. diversus ii. ties (2). The two reports by Washington et al. 0 Citrobacter diversus (9, 10) and that by Booth and McDonald (2) O Ci1trobacter freundig: indole positive appeared in the literature before Ewing and Citrobater freundii' indole negative Davis's first detailed biochemical characteriza-Enterobacter * 0 A tion.

Introduction. Citrobacter species, which are facultative anaerobic Gram-negative bacilli, exist all around us. However, Citrobacter infection is uncommon; they account for % of all Gram-negative infections and 3%–6% of all isolates of Enterobacteriaceae in nosocomial infection [1,2,3].Furthermore, Citrobacter bacteremia is made up of only a few cases of the whole Citrobacter.

The genus Citrobacter, which was defined ininitially encompassed seven species including Citrobacter freundii (type species) and Citrobacter koseri (formerly termed Citrobacter diversus or Levinea malonatica) ().InBrenner et al. identified eight new DNA hybridization groups genetically distinct from C.

freundii and C. koseri ().These additional. Pádua et al.; Isolation, characterization and pathology of Citrobacter freundii infection in nat ive Brazilian catfish Pseudoplatystoma. Braz J Vet Pathol, 20 14, 7(3), - The biochemical characteristics of 1 37 strains of Citrobacter diversus (Burkey) Werkman and Gillen were determined, and the resulting data are summarized.

Shows the lineages A and B derived from the Citrobacter freundii FMU/P, each dot represents a selected colony. The pink dots indicate a typical C. freundii biochemical phenotype; yellow dots indicate a “Salmonella-like” biochemical phenotype; the dots in gradient of pink to yellow represent the intermediates biochemical phenotypes.

An unusual bacterial pathogen of laboratory mice has been previously classified as an atypical biotype of Citrobacter freundii.

Designated C. freundii biotypethis bacterium is the etiologic agent of transmissible murine clonic hyperplasia. An eaeA gene has been shown to be present in this organism and to be necessary for virulence in laboratory mice.

- Citrobacter freundii (Bacterium freundii, Escherichia freundii), Burkey - type species, and Davis (B.R.): Biochemical characterization of Citrobacter diversus (Burkey) Werkman and Gillen and designation of the neotype strain.

Int. Syst. Bacteriol.,22, Biochemical Identification of citrobacter Species Defined by. Citrobacter bacteremia is associated with a high mortality rate between 33% and 48%.[6,7,27]C.

freundii and C. koseri are the two most common pathogens and infections can be acquired from exogenous as well as endogenous sources, being ubiquitous in nature as a saprophyte in soil and sewage and as a commensal in human gastrointestinal tract.

In general, Citrobacter and Salmonella are difficult to distinguish by biochemical analysis [23]; even in their serological characterization, crossed reactions can be identified in the analysis of. Abstract. Various species of Citrobacter may cause infections in neonates and immunocompromised acter koseri (formerly Citrobacter diversus) is best known as the cause of sepsis and meningitis leading to central nervous system (CNS) abscesses in neonates and young onset and late-onset infections occur as for other neonatal.

Identification of individual species within the C. freundii complex. Strains belonging to the C. freundii complex were identified to the species level by biochemical methods on the basis ofthe results ofBrenneret al.

(1), whofound 15 tests to beuseful in separating Citrobactergenomospecies. These tests included indole production; citrate.Citrobacter rodentium (formerly Citrobacter freundii biotype and Citrobacter genomospecies 9) was described on the basis of biochemical characterization and DNA-DNA hybridization data and is.Optimization of biosurfactant production by C.

freundii MG Citrobacter freundii could produce biosurfactant using all the tested media. It was observed that nutrient broth medium yielded the maximum biosurfactant production by C.

freundii MG, and the emulsification index reached 89% (Fig. 6).