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Citrobacter

Citrobacter freundii
Citrobacter freundii
Sistematika
DomenaBakterija
KoljenoProteobacteria
RazredGammaproteobacteria
RedEnterobacterales
PorodicaEnterobacteriaceae
RodCitrobacter
Vrste
  • C. amalonaticus
  • C. braakii
  • C. diversus
  • C. europaeus[1]
  • C. farmeri
  • C. freundii
  • C. gillenii
  • C. koseri
  • C. murliniae
  • C. pasteurii[1]
  • C. rodentium
  • C. sedlakii
  • C. werkmanii
  • C. youngae
  • C. portucalensis[1]

Citrobacter je rod of Gram-negativnih koliformnih bakterija u porodici Enterobacteriaceae.

Vrste C. amalonaticus, C. koseri i C. freundii mgu koristiti citrat kao jedini izvor ugljika. Vrste roda Citrobacter razlikuju se po svojoj sposobnosti da pretvore triptofan u indole (C. koseri je jedina citrobakterija koja je često pozitivna na indole), fermentiraju laktozu (C. koseri je fermentor laktoze) i koristite malonat.[2]

Citrobacter pokazuje sposobnost akumuliranja urana, izgradnjom fosfatnih kompleksa.[3]

Klinički značaj

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Ove bakterije se mogu naći gotovo svugdje u tlu, vodi, otpadnim vodama itd. Također se mogu naći u crijevima čovjeka. Rijetko su izvor bolesti, osim infekcija gastrointestinalnog, mkračnog trakta i kod novorođenčadi meningitisa i sepse.[4][5]

Sojevi C. freundii imaju inducibilne ampC gene koji kodiraju rezistenciju na ampicilin i prvu generaciju cefalosporina. Pored toga, izolati Citrobacter mogu biti rezistentni i na mnoge druge antibiotike, kao rezultat gena rezistencije kodiranih plazmidima.

Reference

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  1. ^ a b c Parte, A.C. "Citrobacter". LPSN. Pristupljeno 18. 10. 2018.
  2. ^ Benjamin A. Lipsky; Edward W. Hook III; Arlene A. Smith & James J. Plorde (1980). "Citrobacter Infections in Humans: Experience at the Seattle Veterans Administration Medical Center and a Review of the Literature". Clin Infect Dis. 2 (5): 746–760. doi:10.1093/clinids/2.5.746. ISSN 1058-4838. PMID 6763304.
  3. ^ L. E. Macaskie; R. M. Empson; A. K. Cheetham; C. P. Grey; A. J. Skarnulis (1992). "Uranium bioaccumulation by a Citrobacter sp. as a result of enzymically mediated growth of polycrystalline HUO2PO4". Science. 257 (5071): 782–784. Bibcode:1992Sci...257..782M. doi:10.1126/science.1496397. PMID 1496397.
  4. ^ V. Drelichman; J. D. Band (1985). "Bacteremias due to Citrobacter diversus and Citrobacter freundii. Incidence, risk factors, and clinical outcome". Archives of Internal Medicine. 145 (10): 1808–1810. doi:10.1001/archinte.145.10.1808. PMID 3899035.
  5. ^ Badger, J.D.; M.F. Stins; K.S. Kim (1999). "Citrobacter freundii Invades and Replicates in Human Brain Microvascular Endothelial Cells". Infection and Immunity. 67 (8): 4208–15. PMC 96726. PMID 10417193.

Vanjski linkovi

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Citrobacter
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