Development and validation of a simplified serotyping ELISA based on monoclonal antibodies for the diagnosis of foot-and-mouth disease virus serotypes O, A, C and Asia 1.

Transboundary and Emerging Diseases
Santina GrazioliEmiliana Brocchi

Abstract

This study describes the development and validation of a simplified enzyme-linked immunosorbent assay (ELISA) for the detection and discrimination of foot-and-mouth disease virus (FMDV) serotypes O, A, C and Asia 1. The multiplex ELISA was designed using selected, type-specific monoclonal antibodies (MAbs) coated onto ELISA plates as catching antibodies and a unique pan-FMDV MAb (1F10) as detector conjugate. Capture MAbs with the broadest intratypic reactivity were selected for each of the four FMDV serotypes by screening large panels of candidate MAbs with a wide spectrum of representative FMDV isolates. An additional pan-FMDV ELISA using 1F10 MAb for both capture and detection was used to complement the specific typing ELISAs to detect virus isolates, which might escape binding to the selected serotype-specific MAbs. This multiplex ELISA was prepared in a stabilized format, with immunoplates pre-coated with six MAbs and positive antigen controls already trapped by the relevant MAb, with the view to make available a diagnostic kit. Diagnostic performance of the MAbs-multiplex ELISA was analysed using 299 FMDV-positive epithelial suspensions representative of the antigenic and genomic variability within each serotype. Overall, ...Continue Reading

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