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Purpose <p>Necrotizing otitis externa (NOE) is a severe infection with potential skull base involvement. The role of fungal pathogens and the need for antifungal treatment remain controversial. We aimed to evaluate clinical characteristics, diagnostic challenges, and microbiology results in fungal NOE and assess considerations for antifungal therapy.</p> Methods <p>This retrospective cohort study was conducted at two tertiary centers. NOE patients, based on clinical and radiological findings, were retrospectively reviewed. Clinical characteristics, microbiological findings, and disease persistence were compared between patients categorized by antifungal treatment status: Combined antifungal-antibiotic therapy versus antibiotic therapy alone.</p> Results <p>Of 125 patients, 25 received combined treatment (13 as initial treatment and 12 after persistent disease) and 100 received antibiotics alone. Combined treatment patients were younger, had prolonged symptoms, and more cranial nerve palsy, requiring longer treatment for persistent and aggressive disease. Fungi were found in 72% of combined-treatment cultures, but most were deemed unreliable by infectious diseases specialists, inconsistently leading to antifungal therapy.</p> Conclusion <p>Antifungal therapy decisions in NOE lack standardization. We propose a protocol incorporating clinical and microbiological data to guide antifungal therapy. Prospective studies are needed to validate this protocol and establish standardized guidelines for fungal NOE treatment.</p>

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Fungal necrotizing otitis externa; challenges in diagnosis and therapy

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月3日

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  • Gaelle Vofo,
  • Ofir Zavdy,
  • Rona Bourla,
  • Hila Elinav,
  • Maya Korem,
  • Sarah Israel,
  • Reut Book,
  • Fatima Azhraa Haddad,
  • Dvir Bar-On,
  • Tomer Menzely,
  • Ohad Hilly,
  • Sagit Stern Shavit

摘要

Purpose

Necrotizing otitis externa (NOE) is a severe infection with potential skull base involvement. The role of fungal pathogens and the need for antifungal treatment remain controversial. We aimed to evaluate clinical characteristics, diagnostic challenges, and microbiology results in fungal NOE and assess considerations for antifungal therapy.

Methods

This retrospective cohort study was conducted at two tertiary centers. NOE patients, based on clinical and radiological findings, were retrospectively reviewed. Clinical characteristics, microbiological findings, and disease persistence were compared between patients categorized by antifungal treatment status: Combined antifungal-antibiotic therapy versus antibiotic therapy alone.

Results

Of 125 patients, 25 received combined treatment (13 as initial treatment and 12 after persistent disease) and 100 received antibiotics alone. Combined treatment patients were younger, had prolonged symptoms, and more cranial nerve palsy, requiring longer treatment for persistent and aggressive disease. Fungi were found in 72% of combined-treatment cultures, but most were deemed unreliable by infectious diseases specialists, inconsistently leading to antifungal therapy.

Conclusion

Antifungal therapy decisions in NOE lack standardization. We propose a protocol incorporating clinical and microbiological data to guide antifungal therapy. Prospective studies are needed to validate this protocol and establish standardized guidelines for fungal NOE treatment.