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Human lung fluke Paragonimus heterotremus: differential diagnosis between Paragonimus heterotremus and Paragonimus westermani infections by EITB

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The specificity of three major polypeptides (35, 33 and 32.5 kD) from Paragonimus heterotremus antigens prepared from ether-extracted adult worms was tested against sera from heterologous infections as well as against P. westermani-infected sera. Only the 35 kD polypeptide was not present, its antigenic determinant being bound to the antibodies from all P. westermani-infected cases. Its cross-reactivity against various sera from heterologous helminthiases and other lung infections showed that it is not bound to these antigenic polypeptides. These major bands cannot be detected by Concanavalin A detector. Our research encourages the pattern (35, 33 and 32.5 kD) of immunoblot reactions for the diagnosis of P. heterotremus infections; the 35 kD antigen is specific for corresponding species and able to differentiate infections between both species of Paragonimus.

Keywords: P. westermani – infected sera; adult worm antigens of P. heterotremus; immunoblot

Document Type: Research Article


Affiliations: 1: Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand, 2: Department of Parasitology, College of Medicine, Chungbuk National University, Chungbuk, Korea

Publication date: January 1, 1998


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