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Fatal Fungicide-Associated Triazole-Resistant Aspergillus fumigatus Infection, Pennsylvania, USA
Abstract:
We report a fatal infection in a 65-year-old immunocompromised male patient caused by pan-triazole-resistant Aspergillus fumigatus containing a TR34/L98H genetic mutation linked to agricultural fungicide use. Clinical and environmental surveillance of triazole-resistant A. fumigatus is needed in the United States to prevent spread and guide healthcare and agricultural practices.
Insights
A fatal Aspergillus fumigatus infection occurred in an immunocompromised patient due to a fungicide-resistant strain. Surveillance is crucial in the US to prevent the spread of resistant fungal infections.
Area of Science:
- Medical Mycology
- Antimicrobial Resistance
- Public Health
Background:
- Aspergillus fumigatus is a common mold that can cause serious infections, particularly in immunocompromised individuals.
- Triazole antifungals are widely used to treat invasive aspergillosis.
- Emergence of triazole resistance in A. fumigatus poses a significant threat to patient outcomes.
Purpose of the Study:
- To report a case of fatal invasive aspergillosis caused by a pan-triazole-resistant Aspergillus fumigatus strain.
- To highlight the link between agricultural fungicide use and the development of resistant fungal strains.
- To emphasize the need for enhanced surveillance of resistant Aspergillus fumigatus in the United States.
Main Methods:
- Case report of a fatal infection in a 65-year-old immunocompromised male.
- Identification and characterization of the Aspergillus fumigatus isolate.
- Genetic analysis to identify resistance mechanisms, including the TR34/L98H mutation.
- Correlation with agricultural fungicide usage in the patient's environment.
Main Results:
- The patient succumbed to a fatal Aspergillus fumigatus infection.
- The causative isolate was resistant to multiple triazole antifungal agents (pan-triazole-resistant).
- The isolate harbored the TR34/L98H genetic mutation, commonly associated with agricultural fungicide exposure.
- This mutation confers resistance to widely used triazole antifungals.
Conclusions:
- Pan-triazole-resistant Aspergillus fumigatus, driven by agricultural fungicide use, can cause fatal infections in immunocompromised patients.
- Urgent clinical and environmental surveillance for triazole-resistant A. fumigatus is necessary in the United States.
- Implementing targeted surveillance will help prevent the spread of resistant strains and inform public health, healthcare, and agricultural policies.
