Zhang X1,2, Diraviyam T1, Li X3, Yao G2, Michael A4. 2016. Biosci Biotechnol Biochem. 80(12):2467-2472. Epub 2016 Aug 2.
1College of Veterinary Medicine , Northwest A&F University , Yangling , China.
2College of Veterinary Medicine , Xinjiang Agricultural University , Urumqi , China.
3Laipson Biological Information Technology Co., LTD , Luoyang , China.
4PSG College of Arts & Science , Coimbatore , India.
Bovine viral diarrhea virus (BVDV) infects cattle and may lead to persistent infection (PI). The PI animals harbor BVDV throughout their life and become immune tolerant against BVDV. Thus, diagnosis of this virus in herd is highly important. Recombinant E2 protein expression (using pET-32a in Escherichia coli) was confirmed by SDS-PAGE and Western blotting; then purified by Ni+ affinity chromatography. Chickens were immunized with BVDV-E2 protein, and IgY antibodies were extracted from egg yolk by PEG-6000. The peak titer of anti-BVDV-E2-IgY was 1:128,000 after the fifth immunization. IgY-based enzyme-linked immuno sorbent assay (ELISA) and immunochromatographic assay (ICA) were further developed. Coincidence of ELISA and ICA test with RT-PCR was 95.45 and 90.91%, respectively. The anti-BVDV-E2 IgY could be used in routine screening of BVDV infection. Besides, it can also be applicable while licensing and/or using live vaccines; screening of imported products containing bovine serum and strong surveillance of BVDV outbreaks.
E2 recombinant protein; ELISA; bovine viral diarrhea virus (BVDV); egg yolk antibody (IgY); immunochromatographic assay (ICA)