2018, Number 5
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Rev Med Inst Mex Seguro Soc 2018; 56 (5)
Microbiology of genus Raoultella, clinical features and difficulties in its diagnosis
Castillo-Macías A, Flores-Aréchiga A, Llaca-Díaz J, Pérez-Chávez F, Casillas-Vega N
Language: Spanish
References: 30
Page: 486-490
PDF size: 732.24 Kb.
ABSTRACT
The genus
Raoultella, which belongs to the
Enterobacteriaceae family, encompasses gramnegative,
oxidase-negative, aerobic, encapsulated and
motionless bacilli. Currently, four species of this genus
have been described:
Raoultella terrigena (R.
terrigena), Raoultella planticola (R. planticola),
Raoultella ornithinolytica (R. ornithinolytica) and
Raoultella electrica (R. electrica), out of which
R.
planticola and
R. ornithinolytica are the most important
because of their probable association as pathogenic
agents. The incidence of this genus has been
underestimated, given that detecting it is really difficult,
since it is misidentified as
Klebsiella spp. by using
manual and automated conventional phenotypic
methods. The rapid and correct detection has been
increasing since the advent of mass spectrometers
(MALDI-TOF MS), which have been used for the
differentiation of
Klebsiella spp. and
Raoultella spp.
Currently 80 cases of bacteremia secondary to
Raoultella spp. have been identified with different sites
of primary infection, which is why it is important to
emphasize proper detection in hospitals and
healthcare facilities.
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