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Molecular identification and phylogenetic analysis of Wuchereria bancrofti from human blood samples in Egypt

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Abstract

Lymphatic filariasis (LF) is a serious vector-borne health problem, and Wuchereria bancrofti (W.b) is the major cause of LF worldwide and is focally endemic in Egypt. Identification of filarial infection using traditional morphologic and immunological criteria can be difficult and lead to misdiagnosis. The aim of the present study was molecular detection of W.b in residents in endemic areas in Egypt, sequence variance analysis, and phylogenetic analysis of W.b DNA. Collected blood samples from residents in filariasis endemic areas in five governorates were subjected to semi-nested PCR targeting repeated DNA sequence, for detection of W.b DNA. PCR products were sequenced; subsequently, a phylogenetic analysis of the obtained sequences was performed. Out of 300 blood samples, W.b DNA was identified in 48 (16%). Sequencing analysis confirmed PCR results identifying only W.b species. Sequence alignment and phylogenetic analysis indicated genetically distinct clusters of W.b among the study population. Study results demonstrated that the semi-nested PCR proved to be an effective diagnostic tool for accurate and rapid detection of W.b infections in nano-epidemics and is applicable for samples collected in the daytime as well as the night time. PCR products sequencing and phylogenitic analysis revealed three different nucleotide sequences variants. Further genetic studies of W.b in Egypt and other endemic areas are needed to distinguish related strains and the various ecological as well as drug effects exerted on them to support W.b elimination.

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All the manuscript authors contributed to every activity of it: idea of paper, study design, collection of materials, methodology, writing the paper, and revising it.

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Authors and Affiliations

  1. Medical Parasitology Department, Kasr Al-Ainy Faculty of Medicine, Cairo University, Cairo, Egypt

    Iman R. Abdel-Shafi, Eman Y. Shoieb, Samar S. Attia & Ayman A. El-Badry

  2. Malaria & Emerging Parasitic Diseases Laboratory (MAPELab), National Microbiology Center, Instituto De Salud Carlos III, Madrid, Spain

    José M. Rubio & Thuy-Huong Ta-Tang

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  1. Iman R. Abdel-Shafi
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  2. Eman Y. Shoieb
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  3. Samar S. Attia
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  4. José M. Rubio
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  5. Thuy-Huong Ta-Tang
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  6. Ayman A. El-Badry
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Correspondence to Ayman A. El-Badry.

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Abdel-Shafi, I.R., Shoieb, E.Y., Attia, S.S. et al. Molecular identification and phylogenetic analysis of Wuchereria bancrofti from human blood samples in Egypt. Parasitol Res 116, 963–970 (2017). https://doi.org/10.1007/s00436-017-5372-7

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  • DOI: https://doi.org/10.1007/s00436-017-5372-7

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