Microbiology of chronic otitis media, new patterns of resistance and susceptibility

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Vol. 54 Núm. 1 (2026): Enero - Marzo
PDF (Spanish)
Published: 2026-05-01
DOI: https://doi.org/10.37076/acorl.v54i1.850
Keywords:
Chronic otitis media, microbiology, antibiogram, resistance

Main Article Content

Alan Yovani valle- obeso
https://orcid.org/0009-0007-9925-2564
Evangelina Sotolongo- Barroso
https://orcid.org/0009-0008-2364-1333
melissa maribel angulo-altamirano
https://orcid.org/0009-0002-1907-6024
Graciela Ibarra-Armenta
https://orcid.org/0009-0009-2607-8432
Erika Celis-Aguilar
Universidad Autónoma de México
https://orcid.org/0000-0003-2210-7637
Bryan Santiesteban-Guevara
https://orcid.org/0009-0003-1860-1728
Jesús Marlén Martínez-Rivera
https://orcid.org/0009-0008-6700-5128

Abstract

Objective: To determine the incidence of microbiological agents in chronic otitis media and their antibiotic  susceptibility and resistance spectrum through cultures.


Materials and Methods: A retrospective study conducted using electronic medical records at  secondary care center, including patients with chronic otitis media and ear microbiological cultures between October 2021 and July 2023.


Results: A total of 21 patients were included, of whom 66.6% (n = 14) were female and 33.3% (n = 7) male. Cholesteatoma was present in 52% (n = 11) of patients, and the right ear was most commonly affected, also in 52% (n = 11) of cases. A total of 47 bacterial cultures were analyzed. The most frequently isolated bacteria were Corynebacterium amycolatum in 23% (n = 8), coagulase-negative Staphylococcus in 17% (n = 6), and Pseudomonas aeruginosa in 15% (n = 5). In fungal cultures, 63.6% (n = 28) showed no growth, while the most commonly isolated fungus was Candida parapsilosis, accounting for 38% (n = 6). The most commonly used antibiotics showed high susceptibility to oxazolidinones, carbapenems, glycopeptides, sulfonamides, tetracyclines, and aminoglycosides, with high resistance rates to clindamycin, macrolides, and quinolones.


Conclusions: Chronic otitis media shows increasing antibiotic resistance, highlighting the importance of performing microbiological cultures and antibiograms to guide appropriate treatment.


Keywords: Chronic otitis media, microbiology, antibiogram, resistance

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Vol. 54 No. 1 (2026): Enero - Marzo

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Microbiology of chronic otitis media, new patterns of resistance and susceptibility. Acta otorrinolaringol cir cabeza cuello [Internet]. 2026 May 1 [cited 2026 May 1];54(1). Available from: https://revista.acorl.org.co/index.php/acorl/article/view/850
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