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Low sensitivity of real time PCRs targeting retrotransposon sequences for the detection of Schistosoma japonicum complex DNA in human serum

Frickmann, H. and Loderstädt, U. and Nickel, B. and Poppert, S. and Odermatt, P. and Sayasone, S. and Van Esbroeck, M. and Micalessi, I. and Cnops, L. and Adisakwattana, P. and Leboulle, G. and Landt, O. and Thye, T. and Tannich, E.. (2021) Low sensitivity of real time PCRs targeting retrotransposon sequences for the detection of Schistosoma japonicum complex DNA in human serum. Pathogens, 10 (8). p. 1067.

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Abstract

While hybridization probe-based real-time PCR assays targeting highly repetitive multi-copy genome sequences for the diagnosis of S. mansoni complex or S. haematobium complex from human serum are well established, reports on the evaluation of respective assays for the identification of S. japonicum complex DNA in human serum are scarce. Here, we assessed the potential use of the retrotransposon sequences SjR2 and SjCHGCS19 from S. japonicum, S. mekongi and S. malayensis for the diagnosis of Asian Schistosoma infections. Based on available S. japonicum sequences and newly provided S. mekongi and S. malayensis sequences, hybridization probe-based real-time PCRs targeting SjR2 and SjCHGCS19 of the S. japonicum complex were designed both as consensus primer assays as well as multi-primer assays for the coverage of multiple variants of the target sequences. The assays were established using plasmids and S. mekongi DNA. While the consensus primer assays failed to detect S. mekongi DNA in human serum samples, the multi-primer assays showed positive or borderline positive results but only in 9.8% (6/61) of serum samples from patients with confirmed S. mekongi infections. Some cross-reactions with samples positive for S. mansoni or S. haematobium were observed but with the SjCHGCS19-PCR only. In spite of the low sensitivity, the presented experience may guide future evaluations of S. japonicum-complex-specific PCRs from human serum.
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) > Eco System Health Sciences > Ecosystem Services, Climate & Health (Cissé)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Medicine (MED) > Diagnostic (Nickel)
UniBasel Contributors:Nickel, Beatrice and Poppert, Sven and Odermatt, Peter
Item Type:Article, refereed
Article Subtype:Research Article
ISSN:2076-0817 (Print)2076-0817 (Linking)
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:19 Dec 2022 14:58
Deposited On:19 Dec 2022 14:58

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