title: Glycoprotein E2 of bovine viral diarrhea virus expressed in insect cells provides calves limited protection from systemic infection and disease.
abstract: Calves were vaccinated with a C-terminally truncated baculovirus expression product of E2 from the Singer strain of bovine viral diarrhea virus. The expressed E2 was glycosylated and retained antigenic authenticity. After induction of viral neutralizing antibody, the calves were challenge exposed with either the homologous Singer strain of virus or with the heterologous 890 strain of virus. Vaccine-induced antibody titer of > or = 2 protected calves from clinical signs of disease induced by homologous viral challenge exposure. An antibody titer of > or = 512 reduced replication of homologous challenge virus to a level which did not induce an appreciable increase in serologic titer of viral neutralizing antibody. Vaccine-induced antibody titer of < or = 4096 did not protect calves from systemic spread of virus or from disease after challenge exposure with heterologous bovine viral diarrhea virus.
authors.affiliation: Enteric Diseases and Food Safety Research Unit, National Animal Disease Center, USDA, Agricultural Research Service, Ames, Iowa, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Bolin
authors.forename: J F
authors.initials: JF
authors.lastname: Ridpath
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology*; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000517:prevention & control*; D002417:Cattle; D002460:Cell Line; D001908:Diarrhea Viruses, Bovine Viral / Q000276:immunology*; D008297:Male; D009036:Moths / Q000166:cytology; D018411:Spodoptera / Q000166:cytology; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology; D014759:Viral Envelope Proteins / Q000008:administration & dosage* / Q000235:genetics / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D014614:Vaccines, Synthetic; D014759:Viral Envelope Proteins; C076551:gp53, bovine viral diarrhea virus