A new enzyme-linked immunosorbent assay (ELISA) for the detection of antibodies against foot-and-mouth disease virus I. Development and method of ELISA
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Abstract
A liquid-phase blocking sandwich ELISA has been developed for the quantification of
antibodies against foot-and-mouth disease virus which may replace the virus neutralisation
(VN) test. This test employs the incubation of a constant amount of antigen with a
range of test serum dilutions in the liquid-phase before being assayed using a trapping
ELISA. Thus it does not rely on the availability or growth of tissue culture cells.
The assay is rapid and relatively simple to perform, reagents are used economically
and results may be recorded within 24 h. The ELISA is sensitive and results are more
specific and more reproducible than those obtained by VN. Results are expressed as
reciprocal antibody titres which are analogous and of a similar order to those recorded
by VN. Individual titres, therefore, may be easily assessed by workers in the field
who are already familiar with VN.