Removal of bovine viral diarrhea virus (BVDV) from lumpy skin disease virus (LSDV) vaccine stocks by passage on chorioallantoic membranes of fertilized hens' eggs

J Virol Methods. 2020 Jan:275:113752. doi: 10.1016/j.jviromet.2019.113752. Epub 2019 Oct 22.

Abstract

Bovine viral diarrhea virus (BVDV) is a common contaminant of Madin-Darby bovine kidney (MDBK) cells as well as fetal calf serum (FCS). It is pathogenic to cattle and regulatory authorities require that veterinary vaccine stocks are free from BVDV. MDBK cells are used in the generation of recombinant lumpy skin disease virus (LSDV) and have been used for the growth of LSDV vaccines. This paper describes how vaccine stocks can be cleared of BVDV by passage through an avian host, nonpermissive to BVDV, but permissive to LSDV. LSDV vaccine stocks were shown to be cleared of BVDV after passage on the chorioallantoic membranes (CAMs) of fertilized 7-day old hens' eggs. Vaccines were passaged a second time on CAMs before being grown in primary lamb testes (LT) cells. Vaccines retained BVDV-negative status after passage on LT cells.

Keywords: Avian chorioallantoic membranes; BVDV; LSDV; MDBK cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cattle
  • Cell Line
  • Chickens
  • Chorioallantoic Membrane / virology*
  • Diarrhea Viruses, Bovine Viral / isolation & purification*
  • Female
  • Fertilization
  • Kidney / cytology
  • Kidney / virology
  • Lumpy skin disease virus*
  • Ovum / cytology*
  • Ovum / virology
  • Serum Albumin, Bovine
  • Viral Vaccines / analysis*
  • Viral Vaccines / standards
  • Virus Cultivation / methods*

Substances

  • Viral Vaccines
  • Serum Albumin, Bovine