title: The suitability of a rolled BHK21 monolayer system for the production of vaccines against the SAT types of foot-and-mouth disease virus. I. Adaptation of virus isolates to the system, immunogen yields achieved and assessment of subtype cross reactivity.
abstract: In an examination of 34 southern African SAT-type foot-and-mouth disease viruses, all but 1 attained satisfactory levels of infectivity within 6 passages in rolled BHK21 monolayer cell cultures. However, there were marked differences between adapted viruses with respect to the mass of immunogen (146S material) produced. Several isolates which consistently produced levels greater than or equal to 2 micrograms/ml were identified. In cross neutralization tests using post-vaccinal sera, SAT-1 and SAT-2 isolates showed considerable diversity and none of the viruses tested would be expected to produce a broad-spectrum response if incorporated into a vaccine. On the other hand, when 2 of the SAT-2 isolates were incorporated into the same vaccine a distinctly broader response resulted.
authors.affiliation: Veterinary Research Institute, Onderstepoort.
authors.forename: J J
authors.initials: JJ
authors.lastname: Esterhuysen
authors.forename: G R
authors.initials: GR
authors.lastname: Thomson
authors.forename: W A
authors.initials: WA
authors.lastname: Ashford
authors.forename: D W
authors.initials: DW
authors.lastname: Lentz
authors.forename: M D
authors.initials: MD
authors.lastname: Gainaru
authors.forename: A J
authors.initials: AJ
authors.lastname: Sayer
authors.forename: C D
authors.initials: CD
authors.lastname: Meredith
authors.forename: D
authors.initials: D
authors.lastname: Janse van Rensburg
authors.forename: A
authors.initials: A
authors.lastname: Pini
mesh_terms: D000818:Animals; D005537:Aphthovirus / Q000276:immunology*; D002417:Cattle; D002478:Cells, Cultured; D003429:Cross Reactions; D014613:Vaccines, Attenuated / Q000592:standards; D014765:Viral Vaccines / Q000592:standards*; D014779:Virus Replication
chemical_list: D014613:Vaccines, Attenuated; D014765:Viral Vaccines