title: Development of an enzyme-linked immunoelectrotransfer blot (EITB) assay using two baculovirus expressed recombinant antigens for diagnosis of Taenia solium taeniasis.
abstract: Taeniasis diagnosis is an important step in the control and elimination of both cysticercosis and taeniasis. We report the development of 2 serological taeniasis diagnostic tests using recombinant antigens rES33 and rES38 expressed by baculovirus in insect cells in an EITB format. In laboratory testing with defined sera from nonendemic areas, rES33 has a sensitivity of 98% (n = 167) and a specificity of 99% (n = 310) (J index: 0.97); rES38 has a sensitivity of 99% (n = 146) and a specificity of 97% (n = 275) (J index: 0.96). Independent field testing in Peru showed 97% (n = 203) of the taeniasis sera were positive with rES33, and 100% of the nontaeniasis sera (n = 272) were negative with rES33; 98% (n = 198) of taeniasis sera were positive with rES38, and 91% (n = 274) of the nontaeniasis sera were negative with rES38. Among the Peruvian sera tested, 17 of 26 Peruvian Taenia saginata sera were false positive with rES38 test. Both tests were also examined with cysticercosis sera, with a positive rate ranging from 21% to 46%. rES33 and rES38 tests offer sensitive and specific diagnosis of taeniasis and easy sample collection through finger sticks that can be used in large-scale studies. They are currently being used in cysticercosis elimination programs in Peru.
authors.affiliation: Division of Parasitic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA. minlevine@hotmail.com
authors.forename: Min Z
authors.initials: MZ
authors.lastname: Levine
authors.forename: Melissa M
authors.initials: MM
authors.lastname: Lewis
authors.forename: Silvia
authors.initials: S
authors.lastname: Rodriquez
authors.forename: Juan A
authors.initials: JA
authors.lastname: Jimenez
authors.forename: Azra
authors.initials: A
authors.lastname: Khan
authors.forename: Sehching
authors.initials: S
authors.lastname: Lin
authors.forename: Hector H
authors.initials: HH
authors.lastname: Garcia
authors.forename: Armando E
authors.initials: AE
authors.lastname: Gonzales
authors.forename: Robert H
authors.initials: RH
authors.lastname: Gilman
authors.forename: Victor C W
authors.initials: VC
authors.lastname: Tsang
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood*; D000947:Antigens, Helminth / Q000235:genetics / Q000276:immunology; D016367:Baculoviridae / Q000235:genetics; D006801:Humans; D015151:Immunoblotting / Q000379:methods*; D011994:Recombinant Proteins / Q000276:immunology; D012680:Sensitivity and Specificity; D041201:Taenia solium / Q000276:immunology*; D013622:Taeniasis / Q000175:diagnosis* / Q000276:immunology
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D011994:Recombinant Proteins