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Chen Z, Zhao Z. Study on the microbial diversity of ear canal secretions from patients with otomycosis. Front Surg 2024; 11:1277799. [PMID: 38450054 PMCID: PMC10916698 DOI: 10.3389/fsurg.2024.1277799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/30/2024] [Indexed: 03/08/2024] Open
Abstract
Otomycosis is caused by fungi, which usually cause discharge and additional discomfort. The highest incidence of otomycosis occurs in summer. To better treat this disease, it is necessary to study the microbial diversity of otomycosis secretions. In this regard, this study used high-throughput sequencing technology to determine the microbial diversity of the ear canal secretions of six typical patients with otomycosis in Wuhan via internal transcribed spacer (ITS) and 16S rRNA analyses and proposed a reasonable clinical treatment plan. Six patients with otomycosis in the Department of Otorhinolaryngology, Hubei Third People's Hospital Affiliated with Jianghan University, were selected from June 2022 to August 2022. The results showed that Staphylococcus spp. (average abundance 29.05%) was the dominant bacteria and Aspergillus spp. (average abundance 90.68%) was the dominant fungus involved in otomycosis secretion. Aspergillus spp. can cause inflammation of the external auditory canal combined with bacterial infections such as Staphylococcus spp., which can cause discharge in the ear canal. High-throughput sequencing provides comprehensive information on the microbial community involved in otomycosis discharge and will aid in evaluating the efficacy of clinical treatment and medication.
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Affiliation(s)
| | - Zhang Zhao
- Department of Otorhinolaryngology, Hubei NO.3 People's Hospital of Jianghan University, Wuhan, China
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McCarty Walsh E, Hanson MB. Fungal Infections of the External Auditory Canal and Emerging Pathogens. Otolaryngol Clin North Am 2023; 56:909-918. [PMID: 37553272 DOI: 10.1016/j.otc.2023.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Fungal infections of the external auditory canal can range from common (otomycosis) to life threatening (necrotizing otitis externa). Proper identification of fungal pathogens is necessary to guide appropriate therapy, and a high index of suspicion for fungal causes of ear canal disease is critical. Fungal pathogens may be an especially important cause of ear canal disease in certain populations, including patients with diabetes, patients recently treated with antibiotics, and immunosuppressed patients. Opportunistic fungal infections of the ear canal are an emerging concern.
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Affiliation(s)
- Erika McCarty Walsh
- Department of Otolaryngology, Head and Neck Surgery, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Matthew B Hanson
- Department of Otolaryngology, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
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Efficacy and Safety of Endoscopic Tympanic Membrane Catheterization Plus Ofloxacin Ear Drops in the Treatment of Secretory Otitis Media in Infants and Toddlers. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:3732243. [PMID: 35911147 PMCID: PMC9334059 DOI: 10.1155/2022/3732243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/19/2022] [Accepted: 06/13/2022] [Indexed: 11/18/2022]
Abstract
Objective To investigate the efficacy and safety of endoscopic tympanic membrane catheterization and ofloxacin ear drops in the treatment of secretory otitis media in infants and toddlers. Methods A total of 80 children suffering from secretory otitis media who underwent treatment in our hospital from July 2018 to April 2020 were divided into the control group (n = 40) and experimental group (n = 40) by randomization. The control group was treated with endoscopic tympanic membrane catheterization alone, while the experimental group was treated with ofloxacin ear drops based on the same treatment as the control group. The treatment effect, air conduction hearing level, clearance rate of pathogenic bacteria secreted by the ear canal, recurrence rate, and adverse reactions were compared between the two groups. Results The treatment in the experimental group led to a significantly better outcome than that in the control group (P < 0.05). After treatment, a substantially improved air conduction hearing level in the experimental group was observed (P < 0.001). A chi-square test showed a significantly higher clearance rate of pathogenic bacteria secreted from the ear canal of the children in the experimental group compared to that of the control group (P < 0.05). The treatment in the experimental group resulted in a lower recurrence rate and adverse reaction rate as compared to the control group (P < 0.05). Conclusion Concurrent endoscopic tympanic membrane catheterization and ofloxacin ear drops showed excellent efficacy in the treatment of secretory otitis media in infants and toddlers. The therapy offers promising solutions for the improvement of hearing level, increase of clearance rate of pathogenic bacteria secreted from the ear canal, and decrease of disease recurrence and adverse reactions during treatment.
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Atsü N, Ergin Ç, Caf N, Türkoğlu Z, Döğen A, İlkit M. Effectiveness of FastFung agar in the isolation of Malassezia furfur from skin samples. Mycoses 2022; 65:704-708. [PMID: 35506984 PMCID: PMC9321000 DOI: 10.1111/myc.13450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/27/2022] [Accepted: 04/30/2022] [Indexed: 11/30/2022]
Abstract
Background Lipophilic basidiomycetous yeasts of the Malassezia genus can cause various skin diseases, such as seborrheic dermatitis, pityriasis versicolor, folliculitis and atopic dermatitis, and even life‐threatening fungemia in newborns and immunocompromised individuals. Routine mycological media used in clinical practice do not contain sufficient lipid ingredients required for the growth of Malassezia species. A recently developed medium, FastFung agar, is promising for culturing fastidious fungal species. Methods In this study, we compared FastFung agar and mDixon agar for culturing Malassezia species from nasolabial fold and retroauricular specimens of 83 healthy individuals and 187 and 57 patients with acne vulgaris and seborrheic dermatitis, respectively. Results Malassezia species were identified using conventional tests and matrix‐assisted laser desorption/ionisation mass spectrometry. In total, 96 of 654 samples (14.6%) contained Malassezia species. The total isolation rate was significantly higher in patients with seborrheic dermatitis (40.4%) than in healthy volunteers (21.7%; p < .05), and the rate of M. furfur isolation was significantly higher for patients with acne vulgaris (13.9%) and seborrheic dermatitis (24.6%) than for healthy individuals (1.5%; p < .05). FastFung agar was superior to mDixon agar in M. furfur isolation (p = .004) but showed similar performance in the case of non‐M. furfur species (p > .05). Among cultured Malassezia species, perfect agreement between mDixon agar and FastFung agar was found only for M. globosa (κ = 0.90). Conclusion Our results indicate that FastFung agar favours the growth of Malassezia species and should be useful in clinical mycology laboratories.
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Affiliation(s)
- Nilhan Atsü
- İstanbul Kent University, Doctor Lecturer in Department of Health Sciences, Turkey
| | - Çağrı Ergin
- Pamukkale University, Medical Faculty, Department of Medical Microbiology, Denizli, Turkey
| | - Nazlı Caf
- Istanbul Başakşehir Çam and Sakura City Hospital, Department of Dermatology, Turkey
| | - Zafer Türkoğlu
- Istanbul Başakşehir Çam and Sakura City Hospital, Department of Dermatology, Turkey
| | - Aylin Döğen
- Mersin University, Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Mersin, Turkey
| | - Macit İlkit
- Cukurova University, Medical Faculty, Department of Medical Microbiology, Adana, Turkey
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Javidnia J, Ghotbi Z, Ghojoghi A, Solhjoo K, Alshahni MM, Jeddi SA, Ahmadi B, Nouripour-Sisakht S, Ansari S, Shokoohi G. Otomycosis in the South of Iran with a High Prevalence of Tympanic Membrane Perforation: A Hospital-Based Study. Mycopathologia 2022; 187:225-233. [PMID: 35347533 DOI: 10.1007/s11046-022-00626-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 03/07/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Otomycosis is a superficial infection of the external ear caused by fungal pathogens. The genera Aspergillus and Candida are considered the main fungal causative agents, with the predominance of Aspergillus section Nigri. The present study aimed to evaluate the clinical symptoms of patients with otomycosis and predisposing factors and to identify fungal etiological agents using molecular approaches. We also present an overview of published papers on tympanic membrane perforation (TMP) secondary to otomycosis. MATERIALS AND METHODS An otorhinolaryngologist collected specimens from external ear canals of patients with suspected otomycosis based on the patient's history and clinical examinations. The specimens were collected using sterile swabs. Fungal isolates were confirmed in clinical specimens by direct microscopy and culture methods. Fungal isolates were identified based on molecular approaches. RESULTS In total, specimens from 211 patients with suspected otomycosis were examined. The presence of fungi was confirmed in about 51% of patients based on fungal elements in direct microscopy and culture-positive fungi. Aspergillus tubingensis was the most commonly isolated species (52.77%), followed by Aspergillus niger (25.92%). Otomycosis due to infection with Candida species was observed in 16% of cases. Of note, in 36.11% of cases, otomycosis was associated with TMP. CONCLUSION A mycological examination is indispensable for a correct diagnosis in patients with otitis extern. TMP should be considered in patients with otomycosis, as it appears to be relatively common in this population.
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Affiliation(s)
- Javad Javidnia
- Student Research Committee Center, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Zahra Ghotbi
- Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran.,Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Aynaz Ghojoghi
- Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Kavous Solhjoo
- Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran.,Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
| | | | - Seyed Ali Jeddi
- Department of Laboratory Sciences, School of Allied Medical Sciences, Abadan University of Medical Sciences, Abadan, Iran
| | - Bahram Ahmadi
- Department of Medical Laboratory Sciences, Faculty of Paramedical, Bushehr University of Medical Sciences, Bushehr, Iran
| | | | - Saham Ansari
- Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Gholamreza Shokoohi
- Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran. .,Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran.
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