Klebsiella

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Klebsiella
Classificazione scientifica
DominioProkaryota
RegnoBacteria
ClasseGamma Proteobacteria
OrdineEnterobacteriales
FamigliaEnterobacteriaceae
GenereKlebsiella
Trevisan, 1885
Specie
vedi testo

Klebsiella (Trevisan, 1885) è un genere di batteri Gram negativi, della famiglia delle enterobacteriaceae, normalmente presente nella mucosa respiratoria e nell'intestino dell'uomo, anche se sono praticamente ubiquitari in natura[1].

Sono provvisti di una capsula prominente a base polisaccaridica[2]: mancano invece di flagello e pertanto non sono mobili. Presentano gli antigeni O e K

Li si trova in genere singoli, a coppie o in piccole catene.

Sono molto simili agli enterobacter, differiscono da questi ultimi per l'incapacità di muoversi e per l'incapacità di decarbossilare l'ornitina.

Spesso gli appartenenti al genere si comportano da patogeni, provocando polmonite, setticemia e altre infezioni ai tessuti molli[3], tra cui l'apparato intestinale, provocando forti gastroenteriti. La specie Klebsiella pneumoniae sembrerebbe inoltre coinvolta nella genesi della spondilite anchilosante in soggetti geneticamente predisposti[4].

Le specie ascritte al genere Klebsiella sono le seguenti secondo l'organizzazione ICSP che ha l'autorità sulla nomenclatura dei batteri e la LPSN che elenca i nomi batterici validi[5]:

Nomi cambiati perché sinonimi

Specie con stato nomenclaturale non validamente pubblicato

  • Klebsiella edwardsii
  • Klebsiella electrica => Raoultella electrica
  • Klebsiella quasivariicola
  • Klebsiella rubiacearum

Le seguente specie sono state trasferite al genere Raoultella dal 2001 e sono ancora valide da aprile 2022[6]

Note

  1. ^ Bagley S, Habitat association of Klebsiella species, in Infect Control, vol. 6, n. 2, 1985, pp. 52–8, PMID 3882590.
  2. ^ Ryan KJ; Ray CG (editors), Sherris Medical Microbiology, 4th ed., McGraw Hill, 2004, p. 370, ISBN 0-8385-8529-9.
  3. ^ Podschun R, Ullmann U, Klebsiella spp. as nosocomial pathogens: epidemiology, taxonomy, typing methods, and pathogenicity factors, in Clin Microbiol Rev, vol. 11, n. 4, 1998, pp. 589–603, PMID 9767057.
  4. ^ Unireuma, Reumatologia per studenti e medici di medicina generale, Idelson-Gnocchi, 2008.
  5. ^ (EN) Klebsiella, su LPSN.
  6. ^ (EN) Raoultella, su LPSN.
    «Taxonomic status: correct name»

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Controllo di autoritàThesaurus BNCF 31986 · LCCN (EN) sh88023266 · BNF (FR) cb12421625s (data) · J9U (EN, HE) 987007534430805171
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