Please use this identifier to cite or link to this item:
doi:10.22028/D291-34877
Title: | Evaluating Different Storage Media for Identification of Taenia saginata Proglottids Using MALDI-TOF Mass Spectrometry |
Author(s): | Wendel, Tabea P. Feucherolles, Maureen Rehner, Jacqueline Poppert, Sven Utzinger, Jürg Becker, Sören L. Sy, Issa |
Language: | English |
Title: | Microorganisms |
Volume: | 9 |
Issue: | 10 |
Publisher/Platform: | MDPI |
Year of Publication: | 2021 |
Free key words: | cestodes diagnosis helminth infections matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry neglected tropical diseases taeniasis |
DDC notations: | 610 Medicine and health |
Publikation type: | Journal Article |
Abstract: | Taenia saginata is a helminth that can cause taeniasis in humans and cysticercosis in cattle. A species-specific diagnosis and differentiation from related species (e.g., Taenia solium) is crucial for individual patient management and disease control programs. Diagnostic stool microscopy is limited by low sensitivity and does not allow discrimination between T. saginata and T. solium. Molecular diagnostic approaches are not routinely available outside research laboratories. Recently, matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) was proposed as a potentially suitable technique for species-specific helminth diagnosis. However, standardized protocols and commercial databases for parasite identification are currently unavailable, and pre-analytical factors have not yet been assessed. The purpose of this study was to employ MALDI-TOF MS for the identification of T. saginata proglottids obtained from a human patient, and to assess the effects of different sample storage media on the technique’s diagnostic accuracy. We generated T. saginata-specific main spectral profiles and added them to an in-house database for MALDI-TOF MS-based diagnosis of different helminths. Based on protein spectra, T. saginata proglottids could be successfully differentiated from other helminths, as well as bacteria and fungi. Additionally, we analyzed T. saginata proglottids stored in (i) LC–MS grade water; (ii) 0.45% sodium chloride; (iii) 70% ethanol; and (iv) 37% formalin after 2, 4, 6, 8, 12, and 24 weeks of storage. MALDITOF MS correctly identified 97.2–99.7% of samples stored in water, sodium chloride, and ethanol, with log-score values ≥2.5, thus indicating reliable species identification. In contrast, no protein spectra were obtained for samples stored in formalin. We conclude that MALDI-TOF-MS can be successfully employed for the identification of T. saginata, and that water, sodium chloride, and ethanol are equally effective storage solutions for prolonged periods of at least 24 weeks. |
DOI of the first publication: | 10.3390/microorganisms9102006 |
Link to this record: | urn:nbn:de:bsz:291--ds-348771 hdl:20.500.11880/31894 http://dx.doi.org/10.22028/D291-34877 |
ISSN: | 2076-2607 |
Date of registration: | 26-Oct-2021 |
Faculty: | M - Medizinische Fakultät |
Department: | M - Infektionsmedizin |
Professorship: | M - Prof. Dr. Dr. Sören Becker |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Files for this record:
File | Description | Size | Format | |
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microorganisms-09-02006-v2.pdf | 5,53 MB | Adobe PDF | View/Open |
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