EQUINE INFECTIOUS-ANEMIA VIRUS - DEVELOPMENT OF A SIMPLE REPRODUCIBLE METHOD FOR TITRATING INFECTIVITY OF THE CELL-ADAPTED STRAIN

  • 1 January 1979
    • journal article
    • research article
    • Vol. 40  (2) , 302-304
Abstract
An equine dermal cell line between the 14th-30th subpassages was used to develop a reproducible method of titrating the infectivity of the cell-adapted strain of equine infectious anemia virus (EIAV). Cells inoculated with EIAV were subcultured or fed once each week and were monitored for the production of P26 antigen of EIAV in supernatant fluids. Ultrathin sections were prepared once each week and were examined for the detection of budding virus-like particles (VLP). The VLP could not be detected in the infected cells subcultured once each week. When the medium was changed once each week and when the cells were not transferred, budding VLP were detected routinely after 3-4 wk. Feeding of the infected cells once each week established the infectivity assay. The reproducibility of the assay on a frozen viral stock preparation was within an endpoint of one 10-fold dilution.