2005, Number 1
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Otorrinolaringología 2005; 50 (1)
Otomycosis in patients with chronic otitis media
Boronat-Echeverría NE, Kageyama-Escobar AM, Méndez-Tovar L
Language: Spanish
References: 32
Page: 45-55
PDF size: 270.36 Kb.
ABSTRACT
Objectives of this study were two: 1) to know the prevalence of otomycosis in patients with chronic otitis media; 2) to determine the types of involved fungi; 35 patients with 17 to 45 years of age were studied, all with diagnosis of mycotic infection by observation of mycelia on microscope during the exploration. Fungi were identified in direct exam, smear and culture in 25 patients (71.4%).The fungi more frequently isolated were species of Aspergillus (19 cases, 54.2%), followed by species of Candida (11 patients, 31.4 %).
In eight patients (22.8%) it was identified more of a type of fungus and the most frequent association was between species of Aspergillus and Candida. Bacterial growth in 25 patients was observed (71.4%); in 12 of them (48%) it happened development of two or more bacteria, most grampositive (species of
Staphylococcus and species of Streptococcus), although also were gramnegative (
Escherichia coli, species of Pseudomonas and
Proteus mirabilis). Association between otomycosis and chronic otitis media was espesignificant (square Chi, p = 0.011), but relation between purulent otorrhea and development of fungi was not detected. A prevalence of 6% of otomycosis in patients with chronic otitis media were calculated. An important data was the development of
Candida parapsilosis as the most frequent yeast, in spite of being this atypical. In this work, the hypothesis is that the presence of fungi in chronic otitis media exerts an important function changing middle and external ear ecobiology, predisposing to infection with antibiotic resistant bacteria, which would explain the difficulty to eradicate them. Also, the use of an algorithm for otomycosis diagnosis sets out.
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