An Indirect ELISA Assay for Detecting Specific SIgA Antibody of Porcine Epidemic Diarrhea Virus

ZHU Haixia

doi:10.19303/j.issn.1008-0384.2023.09.002

Volume 38 Issue 9

Sep. 2023

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ZHU H X. An Indirect ELISA Assay for Detecting Specific SIgA Antibody of Porcine Epidemic Diarrhea Virus [J]. Fujian Journal of Agricultural Sciences，2023，38（9）：1017−1023 doi: 10.19303/j.issn.1008-0384.2023.09.002

Citation:

ZHU H X. An Indirect ELISA Assay for Detecting Specific SIgA Antibody of Porcine Epidemic Diarrhea Virus [J]. Fujian Journal of Agricultural Sciences，2023，38（9）：1017−1023 doi: 10.19303/j.issn.1008-0384.2023.09.002

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An Indirect ELISA Assay for Detecting Specific SIgA Antibody of Porcine Epidemic Diarrhea Virus

doi: 10.19303/j.issn.1008-0384.2023.09.002

ZHU Haixia

JOFUNHWA Biotechnology (Fuzhou) Co., Ltd., Fuzhou, Fujian　350014, China

Received Date: 2022-07-27
Rev Recd Date: 2023-03-18

Available Online: 2023-10-25

Publish Date: 2023-09-28

Abstract

Abstract

Objective A method for detecting SIgA antibodies of porcine epidemic diarrhea virus (PEDV) was established. Methods Using a purified PEDV ZJ08 strain as coating antigen and the antibody for secretory component(SC) labeled by horseradish peroxidase (HRP) as secondary antibody, an indirect ELISA assay with optimized conditions was developed to detect the specific SIgA antibody of PEDV. Result The optimized assay applied a working antigen concentration of 0.6 μg per well, a 1∶5 sample dilution, a coating at 37 ℃ for 1 h, and an 100× dilution of the labeled antibody for 1.5 h incubation at 37 ℃. Other than the target detection, the assay did not react with porcine rotavirus or transmissible gastroenteritis virus. The inter- or intra-batch variations of the assay on test results were less than 10%. On the milk from vaccinated pigs, a 98.1% positive detection on IgA, which was significantly higher than 69.2% on SIgA and merely 70.6% on combined IgA and SIgA, was achieved indicating the deficiency of a single IgA test for an accurate determination on the mucosal immunity of the animal. Conclusion The established assay appeared to appropriately reveal the specific SIgA antibody produced in pigs for protection of the livestock from PEDV by the vaccination.
- Porcine epidemic diarrhea virus,
- indirect ELISA,
- SIgA antibody

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References(22)

References

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