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The antibody response to Dracunculus medinensis in an endemic human population of northern Ghana

Published online by Cambridge University Press:  05 June 2009

P. Bloch ,
P. E. Simonsen  and
B. J. Vennervald
P. Bloch
Affiliation:
Danish Bilharziasis Laboratory, Jaegersborg Alle I D, 2920 Charlottenlund, Denmark
P. E. Simonsen*
Affiliation:
Danish Bilharziasis Laboratory, Jaegersborg Alle I D, 2920 Charlottenlund, Denmark
B. J. Vennervald
Affiliation:
Danish Bilharziasis Laboratory, Jaegersborg Alle I D, 2920 Charlottenlund, Denmark
*
*Author for correspondence.
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Abstract

The serum antibody response (total, and isotypes IgG1, IgG4, IgM, IgA and IgE) to Guinea worm infection was examined in humans from a highly endemic area of northern Ghana by ELISA and SDSPAGE/Western blot techniques using an adult D. medinensis antigen. Sera were obtained early and late in the peak transmission period, from persons with patent and postpatent infections, as well as from persons from the same endemic area who claimed never to have had Guinea worm infection. To observe for potential cross-reactions in the tests, sera were also obtained from areas with no transmission of Guinea worm from patients with hookworm. O. volvulus and W. bancrofti infections, and from non-infected controls. Sera from persons living in the Guinea worm endemic area reacted extensively with Guinea worm antigen in both tests, and large numbers of bands were produced in the Western blots (up to 35 identified for some sera). For most antibody isotypes, the ELISA absorbance values obtained with sera from the same individuals varied between the two transmission seasons, with the highest titres present towards the end of the peak transmission period. The mean antibody titres for persons in the patent and postpatent infection categories were not significantly different when sera were obtained at the same season of the year. Persons from the endemic area, who claimed never to experience patent infections, also had antibodies to Guinea worm, although at significantly lower mean levels than for the patent and postpatent categories. The highest specificity in the ELISA and the most homogenous Western blots were obtained when detecting for antibodies of the IgG4 isotype.

Keywords

Drancunculus medinesisGuinea wormantibody isotypesELISAWestern blotimmunologyNematoda
Type
Research Papers
Information
Journal of Helminthology , Volume 67 , Issue 1 , March 1993 , pp. 37 - 48
Copyright
Copyright © Cambridge University Press 1993

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