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Review
, 56 (5), 486-490

[Microbiology of Genus Raoultella, Clinical Features and Difficulties in Its Diagnosis]

[Article in Spanish]
Affiliations
  • PMID: 30777417
Review

[Microbiology of Genus Raoultella, Clinical Features and Difficulties in Its Diagnosis]

[Article in Spanish]
Alberto Castillo-Macías et al. Rev Med Inst Mex Seguro Soc.

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.

El género Raoultella, perteneciente a la familia Enterobacteriaceae, engloba bacilos gram negativos, oxidasa negativos, aeróbicos, encapsulados e inmóviles. Actualmente se han descrito cuatro especies de este género: Raoultella terrigena (R. terrigena), Raoultella planticola (R. planticola), Raoultella ornithinolytica (R. ornithinolytica) y Raoultella electrica (R. electrica), entre las que la R. planticola y la R. ornithinolytica son las más importantes por su probable asociación como agentes patógenos. Se ha subestimado la incidencia del género por la dificultad que presenta su caracterización al ser mal identificado como Klebsiella spp., al usar métodos fenotípicos manuales y automatizados convencionales. La rápida y correcta detección de Raoultella spp. ha ido aumentando desde la llegada de espectrómetros de masas (MALDI-TOF MS), útiles en la diferenciación entre Klebsiella spp. y Raoultella spp. Se han identificado 80 casos de bacteremia por Raoultella spp., con infección primaria en diversos sitios, por lo que es importante hacer énfasis en su correcta detección en los hospitales y centros de atención médica.

Keywords: Microbiology; Enterobacteriaceae; Raoultella; Diagnosis.

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