Evidence map›Paper›PMID 42256231›Full record

ArticleFrontiers in cellular and infection microbiology2026

Recolonization dynamics of the middle ear microbiota following MESNA-assisted dissection in pediatric cholesteatomatous chronic otitis media.

Uriel Gomez-Ramirez, Carlos De La Torre-González, Perla Villamor, Marisol Huante Guido, Araceli Contreras-Rodríguez, Norma Velázquez-Guadarrama

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Article in Frontiers in cellular and infection microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Uriel Gomez-RamirezMicrobiology and Antimicrobial Resistance Research Laboratory, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.
Carlos De La Torre-GonzálezDepartment of Otolaryngology, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.
Perla VillamorDivision of Pediatric Otolaryngology, Department of Otolaryngology-Head and Neck Surgery, Stanford University, Stanford, CA, United States.
Marisol Huante GuidoDepartment of Otolaryngology, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.
Araceli Contreras-RodríguezLaboratorio de Microbiología General, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico.
Norma Velázquez-GuadarramaMicrobiology and Antimicrobial Resistance Research Laboratory, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Introduction: Cholesteatomatous chronic otitis media (CCOM) remains a clinical challenge due to its high recurrence rates despite surgical intervention. Sodium 2-mercaptoethanesulphonate (MESNA) is used to assist dissection, yet its impact on the middle ear microbiome and ecological recovery remains poorly understood. The aim of this study is to characterize the microbiota of paediatric CCOM and evaluate the ecological shifts induced by MESNA-assisted surgery. Methods: We analyzed 16S rRNA gene sequences (V3-V4) from middle ear tissue of paediatric patients with CCOM (CCOM Before MESNA, n = 13; CCOM After MESNA, n = 13) and healthy controls (n = 11). Bioinformatic processing was performed via QIIME2 and DADA2. We employed a Compositional Data Analysis (CoDA) framework, centering on Aitchison distances, ALDEx2 for differential abundance, and consensus co-occurrence networks (SparCC, SPIEC-EASI, and CLR-Pearson). Functional potential was inferred using PICRUSt2. Results: CCOM was associated with a marked reduction in microbial network connectivity, decreasing from 185 edges in healthy controls to only two total edges in the CCOM Before MESNA stage. Discussion: Our findings identify network fragmentation and functional dysbiosis as the ecological signatures of pediatric CCOM. While MESNA disrupts the dysbiotic equilibrium, it does not fully restore a healthy stable climax community within the studied timeframe, as defined in ecological succession theory. These results support a paradigm shift from simple pathogen eradication toward ecological restoration as a strategy to prevent disease recurrence in CCOM patients.

Indexed as

Cholesteatoma, Middle EarEar, MiddleMesnaMicrobiotaOtitis MediaBacteriaChildChild, PreschoolChronic DiseaseComputational BiologyDNA, BacterialFemaleHumansMaleRNA, Ribosomal, 16SSequence Analysis, DNADNA, BacterialMesnaRNA, Ribosomal, 16S16S rRNA sequencingcholesteatomatous chronic otitis media (CCOM)co-occurrence networksdysbiosismiddle ear microbiotanetwork analysispediatric otolaryngologysodium 2-mercaptoethanesulphonate (MESNA)

Identifiers

PMID42256231
PMCPMC13236964

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.