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A recombinant antigen cocktail enzyme-linked immunosorbent assay (ELISA) for diagnosis of contagious bovine pleuropneumonia (CBPP) was developed after careful selection of antigens among one-third of the surface proteome proteins of the infectious agent Mycoplasma mycoides subsp. mycoides small colony (M. mycoides SC). First, a miniaturized and parallelized assay system employing antigen suspension bead array technology was used to screen 97 bovine sera for humoral immune responses toward 61 recombinant surface proteins from M. mycoides SC. Statistical analysis of the data resulted in selection of eight proteins that showed strong serologic responses in CBPP-affected sera and minimal reactivity in negative control sera, with P values of &lt;10(-6). Only minor cross-reactivity to hyperimmune sera against other mycoplasmas was observed. When applied in an ELISA, the cocktail of eight recombinant antigens allowed a fivefold signal separation between 24 CBPP-affected and 23 CBPP-free sera from different geographical origins. No false-positive results and only two false-negative results were obtained. In conclusion, the selected recombinant mycoplasma antigens qualified as highly specific markers for CBPP and could be employed in both a suspension bead array platform and a cocktail ELISA setting. This set of proteins and technologies therefore offers a powerful combination to drive and further improve serological assays toward reliable, simple, and cost-effective diagnosis of CBPP.

clinical and vaccine immunology

Multiplex Screening of Surface Proteins from <i>Mycoplasma mycoides</i> subsp. <i>mycoides</i> Small Colony for an Antigen Cocktail Enzyme-Linked Immunosorbent Assay

Multiplex Screening of Surface Proteins from Mycoplasma mycoides subsp. mycoides Small Colony for an Antigen Cocktail Enzyme-Linked Immunosorbent Assay