J Vet Sci.  2020 Jul;21(4):e68. 10.4142/jvs.2020.21.e68.

A rapid and quantitative fluorescent microsphere immunochromatographic strip test for detection of antibodies to porcine reproductive and respiratory syndrome virus

Affiliations
  • 1CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
  • 2College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning 530004, China
  • 3College of Animal Science and Technology, Shihezi University, Shihezi 832003, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

A fluorescent microsphere-based immunochromatographic strip test (FICT) was developed for the rapid, sensitive, and quantitative detection of porcine reproductive and respiratory syndrome virus (PRRSV) antibodies at the pen-side. The assay was based on the formation of a sandwich immune-complex (anti-pig IgG-PRRSV antibodies-NSP7/N), which was validated by a comparison with IDEXX-ELISA using 3325 clinical specimens. The diagnostic specificity, sensitivity, and accuracy of FICT were 97.28, 93.41, and 94.95%, respectively. FICT showed a good correlation with the virus neutralization assay. Overall, a promising pen-side diagnostic tool was developed for the rapid and quantitative detection of PRRSV antibodies within 15 min.

Keyword

Fluorescence; immunochromatographic assay; PRRSV; immunochromatography; pen-side detection
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