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Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice
Published on: March 17, 2014
Chronic otitis media due to Auritidibacter ignavus: a two-case series and brief literature review
Jesús E Guevara Osorio1, Teresa Nebreda Mayoral1, Milagros Cuervo Abarquero1
1Servicio de Microbiología e Inmunología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.
Introduction:
Auritidibacter ignavus is an emerging Gram‑positive bacillus with otic tropism linked to recurrent and refractory ear infections.
Methods:
We describe two cases of chronic otitis media seen in 2024 at a Spanish tertiary hospital. Ear discharge was cultured on standard media; identification was achieved by MALDI‑TOF and susceptibility interpreted using EUCAST criteria for Corynebacterium spp. given the lack of organism‑specific breakpoints.
Results:
Two octogenarian patients with persistent otorrhea after failed topical therapy grew A. ignavus. Isolates were susceptible to selected beta‑lactams and to vancomycin, linezolid, tetracycline and rifampicin. Both improved with systemic antibiotics.
Conclusions:
A. ignavus should be considered in refractory chronic otitis media. Updated MALDI‑TOF libraries and, when needed, 16S/genomics support accurate identification; systemic therapy may be warranted when the middle ear is involved.
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