Isolation of azole-resistant Aspergillus fumigatus from the environment in the south-eastern USA
Open accessAbstract
Background: Azole resistance in isolates of the fungus Aspergillus fumigatus has been associated with agricultural use of azole fungicides. Environmental isolation of resistant isolates has been reported in Asia, Africa, Europe and South America. Objectives: To determine whether A. fumigatus isolates containing TR34/L98H or TR46/Y121F/T289A can be found in fields in the USA treated with agricultural azoles. Methods: Crop debris was collected and screened for A. fumigatus. All A. fumigatus isolates were screened for azole resistance. The CYP51A gene of azole-resistant isolates was sequenced. The population structure of a subset of isolates was determined using microsatellite typing. Results: This article identifies azole-resistant A. fumigatus isolates containing the TR34/L98H mutation in an experimental peanut field that had been treated with azole fungicides. Conclusions: These findings suggest the development of resistance to azole antifungals in A. fumigatus may be present where agricultural azoles are used in the USA.
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Environmental presence of azole-resistant Aspergillus spp. in places where low socioeconomic populations live, including racial minorities, places those individuals at risk of acquiring invasive disease that is difficult to treat.
“Such environmental presence of azole-resistant Aspergillus spp. in places where low socioeconomic populations live, including racial minorities, places those individuals at risk of acquiring invasive disease that is difficult to treat.”
From Race and ethnicity: Risk factors for fungal infections? (2023) · cites this paper as [74]
Azole-resistant Aspergillus spp. is linked to the use of agricultural azoles and has been reported in different parts of the world; incidence in the US remains low, but it was reported from crop debris in the southeast US with isolates carrying TR46/Y121F/T289A mutations linked to azole resistance.
“Lastly, azole-resistant Aspergillus spp. is an emerging pathogen that is linked to the use of agricultural azoles (tebuconazole and propiconazole) has been reported in different parts of the world. The incidence of such azole-resistant Aspergillus spp. in the US remains low, but it was reported from crop debris in the southeast regions of the US, with isolates carrying TR46/Y121F/T289A mutations”
From Race and ethnicity: Risk factors for fungal infections? (2023) · cites this paper as [74]
Duplications in the cyp51A gene promoter coupled with TR34/L98H and TR46/Y121F/T289A substitutions are becoming widespread in the environment associated with azole use in agriculture and are also isolated from hospital patients without previous antifungal exposure.
“Alarmingly, duplications in the cyp51A gene promoter coupled with specific amino acid substitutions, TR34/L98H and TR46/Y121F/T289A, are becoming widespread in the environment associated with azole use in agriculture, while also isolated from hospital patients without previous exposure to antifungal drugs19–22.”
From Molecular mechanisms governing antifungal drug resistance (2023) · cites this paper as [21]
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Self-citation
- Authors
- Hurst, S. F., Berkow, E. L., Stevenson, K. L., Litvintseva, A. P., & Lockhart, S. R.
- Affiliations
- Centers for Disease Control and Prevention (US)
- University of Georgia (US)
- Corresponding author
- Lockhart, Shawn R.
- Venue
- Journal of Antimicrobial Chemotherapy
- Publisher
- Oxford University Press (OUP)
- Published
- 2017-06-01
- Volume
- 72
- Issue
- 9
- Pages
- 2443-2446
- ISSN
- 0305-7453 (ISSN-L)
- 1460-2091
- PMC
- PMC11935745
- OpenAlex
- W2621329764
- Cited by
- 66
- References
- 31
- Citations by year
- 2026: 12 · 2025: 2 · 2024: 6 · 2023: 6 · 2022: 4 · 2021: 14 · 2020: 3 · 2019: 7 · 2018: 11 · 2017: 1
- FWCI
- 4.63
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of Antimicrobial Chemotherapy (publishedVersion, public-domain)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- University of Georgia
- National Institutes of Health (CC999999)
- Centers for Disease Control and Prevention
- Topics
- Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Fungal Plant Pathogen Control
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
- Keywords
- Aspergillus fumigatus, azole resistance, TR34/L98H mutation, cyp51A gene, peanut field
- MeSH terms
- Composting, Antifungal Agents, Aspergillosis, Aspergillus fumigatus, Azoles, Cytochrome P-450 Enzyme System, Fungal Proteins, Fungicides, Industrial, Genotype, Humans, Microbial Sensitivity Tests, Mutation, Soil Microbiology, United States, Crops, Agricultural, Microsatellite Repeats, Drug Resistance, Fungal, High-Throughput Nucleotide Sequencing
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