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  • Title: Molecular identification and biological characteristic analysis of an Apiotrichum mycotoxinivorans (formerly Trichosporon mycotoxinivorans) strain isolated from sputum specimens of a pediatric patient with pneumonia.
    Author: Peng L, Jiang YQ, Jiang GM, Ou JY, Zeng LT, Zhang HH, Chen DQ, Jiang YT.
    Journal: J Mycol Med; 2019 Jun; 29(2):120-126. PubMed ID: 30898449.
    Abstract:
    Apiotrichum mycotoxinivorans (formerly Trichosporon mycotoxinivorans) has long been used to degrade fungal toxins in livestock feed. However, clinic reports about this type of fungus are rare. In this study, we report the morphology, biochemistry, and molecular characteristics of an A. mycotoxinivorans strain isolated from a pediatric patient with congenital ventricular septal defect and pneumonia. A female patient, 26 months old, presented with congenital ventricular septal defect. Pulmonary infection symptoms were observed after the patient received cardiac repair surgery. Sputum bacterial and fungal cultures were positive for Elizabethkingia anophelis and a fungus, which was not readily identifiable using biochemical identification, or MALDI-TOF MS analysis. The strain was finally identified as A. mycotoxinivorans using amplification and sequencing of the D1/D2 region of 26S rDNA, ITS, and IGS1. Antifungal susceptibility test results suggested that fluconazole or voriconazole may be an appropriate choice for antifungal therapy. A biodegradability of ochratoxin A was considered as a characteristic of the fungal strain. Our results support the existing evidence that A. mycotoxinivorans is an opportunistic pathogen for human beings. Nucleic acid analysis allows for the accurate identification of the species in instances where conventional identification methods such as biochemical testing and MALDI-TOF MS may be unsuccessful.
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