Molecular Diagnosis of Schistosoma Infections in Urine Samples of School Children in Ghana

Yvonne A. Aryeetey Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Samuel Essien-Baidoo Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Irene A. Larbi Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Kwaku Ahmed Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Abena S. Amoah Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Benedicta B. Obeng Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Lisette van Lieshout Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Maria Yazdanbakhsh Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Daniel A. Boakye Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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Jaco J. Verweij Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana; Department of Laboratory Sciences, University of Cape Coast, Ghana; Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands

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DOI:
https://doi.org/10.4269/ajtmh.12-0571
Volume/Issue:
Volume 88: Issue 6
Page(s):
1028–1031
Restricted access
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Recent studies using an internal transcribed spacer (ITS)-based real-time polymerase chain reaction (PCR) for the detection of Schistosoma DNA in urine samples has shown high sensitivity and specificity when performed on controls and known microscopy-positive samples. In this study, using 730 urine samples collected from children in five primary schools from different communities in the Greater Accra region of Ghana, specific detection of Schistosoma DNA showed excellent sensitivity of 100% and 85.2% in urines with > 50 eggs/10 mL urine and ≤ 50 eggs/10 mL of urine, respectively. Additionally, Schistosoma-specific DNA was amplified in 102 of 673 samples in which Schistosoma eggs could not be detected with microscopy. Taking microscopy and/or PCR-positive samples as true positives, the negative predictive value calculated was 94.6–100% for each school sampled as compared with 54.3–95.7% using microscopy. This ITS-based real-time PCR proves to be a powerful tool in epidemiological surveys of schistosomiasis providing more precise and sensitive results than microscopy.

Author Notes

* Address correspondence to Yvonne A. Aryeetey, Parasitology Unit, Noguchi Memorial Institute for Medical Research, PO Box LG 581, University of Ghana, Legon , Accra, Ghana. E-mail: yaryeetey@noguchi.mimcom.org

Financial support: European Research Council FP6 (TRANCHI, GLOFAL, and COINFECT), FP7 (SCHISTOVAC), and the Prof. Dr. P.C. Flu Foundation.

Authors' addresses: Yvonne A. Aryeetey, Irene A. Larbi, Kwaku Ahmed, Abena S. Amoah, Benedicta B. Obeng, and Daniel A. Boakye, Parasitology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana, E-mails: yaryeetey@noguchi.mimcom.org, i.larbi@lancaster.ac.uk, kahmed@noguchi.mimcom.org, a.s.Amoah@lumc.nl, baffoah@yahoo.com, and DBoakye@noguchi.mimcom.org. Samuel Essien-Baidoo, Department of Laboratory Sciences, University of Cape Coast, Ghana, E-mail: sbessien@yahoo.com. Lisette van Lieshout and Maria Yazdanbakhsh, Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands, E-mails: lvanlieshout@lumc.nl and m.yazdanbakhsh@lumc.nl. Jaco J. Verweij, Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands, E-mail: j.verweij@elisabeth.nl.

Copyright:
© The American Society of Tropical Medicine and Hygiene 2013
Received:
13 Sep 2012
|
Accepted:
11 Dec 2012
|
Published Online:
05 Jun 2013
Cover The American Journal of Tropical Medicine and Hygiene
The American Journal of Tropical Medicine and Hygiene
Print ISSN:
0002-9637
Online ISSN:
1476-1645
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