Siddig, E. E. and Ahmed, A. and Hassan, O. B. and Bakhiet, S. M. and Verbon, A. and Fahal, A. H. and van de Sande, W. W. J.. (2023) Using a Madurella mycetomatis specific PCR on grains obtained via non-invasive fine needle aspirated material is more accurate than cytology. Mycoses, 66 (6). pp. 477-482.
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Official URL: https://edoc.unibas.ch/94904/
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Abstract
BACKGROUND: Eumycetoma is a chronic subcutaneous inflammatory fungal infection most often caused by Madurella mycetomatis. Using a species-specific PCR on DNA directly isolated from grains is currently the most reliable method for species identification. However, so far, PCR has been performed on grains obtained through deep-seated surgical biopsies, which are invasive procedures. Grains can also be obtained via ultrasound-guided fine needle aspiration (US-FNA). Here we determined the diagnostic performance of species-specific PCRs performed on samples obtained through US-FNA. METHODS: From 63 patients, US-FNA was performed to obtain eumycetoma grains; 34 patients also underwent a deep-seated biopsy. From the grains, DNA was isolated, and one pan-fungal and two M. mycetomatis-specific PCRs were performed. The sensitivity and specificity were determined. RESULTS: Of the 63 patients who underwent US-FNA, 78% (49/63) had evidence of eumycetoma based on cytology and 93.7% (59/63) based on species-specific PCRs. In the 34 patients for whom surgical biopsies were performed as well, 31 patients had a positive PCR for M. mycetomatis when DNA was isolated from the deep-seated biopsy, and 30 had a positive PCR when DNA was obtained from US-FNA material. This resulted in a 96.8% sensitivity, and 100% specificity with 97.1% diagnostic accuracy for PCR performed on US-FNA. CONCLUSION: PCR performed on US-FNA material has a similar sensitivity and specificity as PCR performed on deep-seated biopsies. Therefore when using PCR, a deep-seated biopsy may not be necessary to obtain grains.
Faculties and Departments: | 09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) 09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Human and Animal Health > One Health (Zinsstag) |
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UniBasel Contributors: | Ahmed, Ayman |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
ISSN: | 0933-7407 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
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Last Modified: | 07 Jun 2023 08:15 |
Deposited On: | 07 Jun 2023 08:15 |
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