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Published on: May 27, 2022
Multi-resistant aspergillosis due to cryptic species
1Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK, susan.howard76@virginmedia.com.
Abstract:
Reports of cryptic species causing aspergillosis in humans are increasing in the literature. Cryptic species are defined as those which are morphologically indistinguishable, although their identifications can be confirmed using molecular or other techniques which continue to become more widely available in the clinical setting. Antifungal resistance has often been noted in these cases, and indeed there does appear to be a higher prevalence of reduced susceptibility in cryptic species. Many of these observations are published as individual case reports or as a small component of larger data sets, making it challenging to review and compare the data fully. This review article seeks to describe the susceptibility trends and key learning outcomes of specific cases of infections caused by cryptic species, including Aspergillus alliaceus, Aspergillus calidoustus, Aspergillus felis, Aspergillus lentulus, Aspergillus tubingensis, Aspergillus viridinutans and Neosartorya pseudofischeri. These reports highlight the clinical need for full accurate identification and susceptibility testing to guide patient care.
Insights
Cryptic fungal species are increasingly causing human aspergillosis. These species often show antifungal resistance, necessitating accurate identification and susceptibility testing for effective patient treatment.
Area of Science:
- Medical Mycology
- Infectious Diseases
Background:
- Cryptic fungal species, morphologically identical but genetically distinct, are increasingly implicated in human aspergillosis.
- Antifungal resistance is a significant concern associated with these cryptic species.
Purpose of the Study:
- To review susceptibility trends and clinical outcomes of infections caused by specific cryptic *Aspergillus* and *Neosartorya* species.
- To emphasize the clinical importance of accurate species identification and antifungal susceptibility testing.
Main Methods:
- Literature review of case reports and data sets focusing on cryptic fungal species.
- Analysis of antifungal susceptibility patterns and clinical presentations.
Main Results:
- Identified specific cryptic species (*Aspergillus alliaceus, Aspergillus calidoustus, Aspergillus felis, Aspergillus lentulus, Aspergillus tubingensis, Aspergillus viridinutans*, and *Neosartorya pseudofischeri*) causing human infections.
- Observed a higher prevalence of reduced antifungal susceptibility in these cryptic species.
Conclusions:
- Accurate identification of cryptic fungal species is crucial for effective management of aspergillosis.
- Antifungal susceptibility testing is essential to guide therapeutic decisions in cases of cryptic species infections.
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