Identification of Anaerobiospirillum succiniciproducens by MALDI-TOF mass spectrometer. A bacteremia in an immunocompetent patient.

Abstract

Rev Esp Quimioter 2023;36(3): 319-321 319 tions, growth was observed only on Brucella agar as flat translucent colonies with negative catalase and oxidase reactions, confirming the identification of A. succiniproducens by MALDI-TOF MS with a value of 2,10. Identification was confirmed by 16S rRNA sequencing with A. succiniproducens as result with an homology percentage of 88,3%. Antibiotic susceptibility was performed by E-test on Brucella agar in anaerobiosis at 37oC during 48h of incubation. Following the EUCAST (version 8.1, 2018) anaerobic Gram-negative rods and PK-PD cut-off points, the strain was susceptible to amoxicillin/clavulanate, cefuroxime, cefotaxime, imipenem, ertapenem, moxifloxacin and levofloxacin but resistant to penicillin, amoxicillin, clindamycin and metronidazole (Table 1).