Peer-reviewed veterinary case report
Comparison of commercial enzyme-linked immunosorbent assays and fluorescent microbead immunoassays for detection of antibodies against porcine reproductive and respiratory syndrome virus in boars.
- Journal:
- Journal of virological methods
- Year:
- 2014
- Authors:
- Gerber, Priscilla F et al.
- Affiliation:
- Department of Veterinary Diagnostic and Production Animal Medicine · United States
Plain-English summary
This study looked at different tests to see how well they can find antibodies against the porcine reproductive and respiratory syndrome virus (PRRSV) in boars. Researchers compared two commercial tests called ELISAs and a special in-house test called FMIA. They found that one of the ELISA tests, IDEXX-Se, was able to detect positive cases earlier than the other ELISA, HIPRA-Se, and both had similar accuracy overall. However, the FMIA test had a much higher rate of false positives, meaning it incorrectly identified healthy pigs as infected. Ultimately, the IDEXX-Se test was the most effective for early detection and had similar accuracy to HIPRA-Se.
Abstract
The objective of this study was to compare the ability of two commercial enzyme-linked immunosorbent assays (ELISAs) and an in-house fluorescent microbead immunoassay (FMIA) to detect IgG antibodies against porcine reproductive and respiratory syndrome virus (PRRSV) types 1 and 2 in serum and oral fluids from boars infected experimentally. Samples from uninfected control pigs and PRRSV-negative field samples were also used. Serum samples were tested by ELISAs (IDEXX Se, HIPRA Se) and an in-house FMIA-Se for detection of PRRSV types 1 and 2. Oral fluids were tested by ELISAs (IDEXX-SO, IDEXX-OF, HIPRA-OF) for detection of PRRSV types 1 and 2. Among the sera, IDEXX-Se and HIPRA-Se had similar sensitivity and specificity (p>0.05); however, IDEXX-Se detected positive animals earlier than HIPRA-Se (p<0.05). FMIA-Se had the highest false-positive rates in known negative field samples (1/205 for IDEXX-Se, 5/205 for HIPRA-Se, and 37/205 for FMIA-Se; p<0.01). Serum and oral fluid samples had similar detection rates and antibody kinetics using the IDEXX tests. There was a higher detection rate in serum than oral fluid using the HIPRA assays. In this study, the nucleocapsid protein utilized as antigen in the FMIAs yielded a low specificity. IDEXX-Se had the earliest detection and similar sensitivity and specificity to the HIPRA-Se.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/24361873/