Development of the multi-epitope chimeric antigen rqTSA-25 from Taenia saginata for serological diagnosis of bovine cysticercosis

PLoS Negl Trop Dis. 2018 Apr 12;12(4):e0006371. doi: 10.1371/journal.pntd.0006371. eCollection 2018 Apr.

Abstract

Bovine cysticercosis is a worldwide distributed zoonosis caused by the larval form of Taenia saginata present in bovine muscles. The diagnosis is based on the postmortem inspection at slaughterhouses and consists of the macroscopic visualization of lesions caused by cysticercosis in muscle sites. However, parasitized animals can pass unnoticed during sanitary inspection. Thus, the objective of this study was to characterize and evaluate the performance of different peptides from different regions of T. saginata for the cysticercosis diagnosis using enzyme-linked immunosorbent assay. We generated and evaluated a new recombinant protein chimera derived from the fusion of different peptides. We selected three distinct regions of T. saginata and predicted six peptides with antigenic potential (EP2-EP7). These peptides were analyzed individually and selected for generating a new chimeric recombinant protein. The new protein was termed rqTSA-25, and its performance rates were: 93.3% sensitivity (confidence interval (CI) = 76-98%), 95.3% specificity (CI = 82-99%), 93% positive predictive value (CI = 76-98%), 95% negative predictive value (CI = 82-99%), and 95% accuracy. In the immunoblot, this protein showed no false positive or false negative reaction. Thus, the use of rqTSA-25 is recommended for the diagnosis of bovine cysticercosis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Helminth / immunology
  • Antigens, Helminth / genetics
  • Antigens, Helminth / immunology*
  • Cattle
  • Cattle Diseases / diagnosis*
  • Cattle Diseases / parasitology
  • Cysticercosis / diagnosis
  • Cysticercosis / parasitology
  • Cysticercosis / veterinary*
  • Enzyme-Linked Immunosorbent Assay / veterinary
  • Epitopes / genetics
  • Epitopes / immunology*
  • Female
  • Mice, Inbred BALB C
  • Muscles / parasitology
  • Peptides / genetics
  • Peptides / immunology*
  • Predictive Value of Tests
  • Recombinant Proteins
  • Sensitivity and Specificity
  • Taenia saginata / genetics
  • Taenia saginata / immunology*
  • Taenia saginata / isolation & purification

Substances

  • Antibodies, Helminth
  • Antigens, Helminth
  • Epitopes
  • Peptides
  • Recombinant Proteins

Grants and funding

The authors would like to thank Fapemig (Research SupportFoundation of Minas Gerais), CAPES (the Coordination for the Improvement of Higher Education Personnel), and CNPq (National Counsel of Technological and Scientific Development) for the given support. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.