RESULTS
Sustainable propagation of CyHV-2 using cell lines
Sustainable propagation of CyHV-2 was successful
in GFF cells and SRTF cells, whereas no CPE was
observed in RKF cells. The CPE induced by CyHV-2
in GFF and SRTF cell cultures was similar and was
characterized by granulation, cytoplasmic vacuolization,
syncytium formation in focal areas and the
appearance of rounded bright cells (Fig. 1). Holes
appeared in the cell monolayer at 7 to 10 d post inoculation,
where cells had detached from the plastic
substrate.
The appearance of CPE was more rapid in SRTF
than in GFF cell cultures, and the sensitivity of SRTF
cells to CyHV-2 was higher than GFF cells (data not
shown). However, the cost of maintaining SRTF cells
is higher than GFF cells, since SRTF requires the
flask to be coated with collagen, which is expensive,
and the sub-culture split ratio is only 1:2. Therefore,
GFF cells were used for the preparation of inocula for