Evaluation of a Recombinant Parasite Antigen for the Diagnosis of Lymphatic Filariasis

Senarath DissanayakeDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Huijun ZhengDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Gerusa DreyerDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Min XuDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Laxman WatawanaDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Guanghua ChengDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Shihai WangDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Paul MorinDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Bijia DengDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Liliana KurniawanDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Albert VincentDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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Willy F. PiessensDepartment of Tropical Public Health, Harvard School of Public Health, Department of Filariasis, Guizhou Provincial Institute of Parasitic Diseases, Department of Parasitology, Aggeu Magalhaes Research Centre (FIOCRUZ), Faculty of Medicine, Department of Parasitology, Shanghai Medical University, National Institute of Health, Research and Development, Department of Medicine, University of South Florida, Boston, Massachusetts, The People's Republic of China

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We evaluated the usefulness of a recombinant parasite antigen (recSXP1) for the serologic diagnosis of lymphatic filariasis. A large proportion of sera from microfilaremic donors living in five different endemic countries (356 of 446 [80%]) contained IgG antibodies to recSXP1, as do sera from ∼33% of amicrofilaremic patients with acute filarial disease and/or indirect evidence of active filarial infection. Exposure to filarial worms per se does not appear sufficient to elicit an anti-SXP1 antibody response. Thus, this serologic test identifies a large proportion of persons with active lymphatic filariasis among residents of endemic areas.

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