VM mice have a different PrP sequence (PrP-b) and have been used to identify BSE after 2 serial passages
on the basis of incubation period (IP) and LP data (23).
Additional serial passages
from these cattle TSE sources are required for further characterization, especially since the possibility cannot be excluded that transmission of a cattle TSE into mink can modify its biologic properties.
coli by serial passage
on cefoxitin-containing medium to determine which of these two resistance mechanisms was predominant and if our findings were representative of those seen in clinical isolates.
Transformants retained resistance till 70th passage ciprofloxacin was found to have moderate activity in stability after 48th number of serial passages
It has been known that with increasing cell serial passages
, BMSCs display the senescence-associated phenotypes as a result of degradation of cellular organelles .
The pathogenicity of procured IBH-HPS virus reduced considerably after serial passages
on Vero cells.
Further studies, such as continuous serial passages
and neutralization assays, are needed to determine the final activity of the virus in Vero cells.
It is clear from the results that pathogenicity of original IBDV reduced considerably after serial passages
in embryonated chicken eggs.
Because DT104o was highly variable, 5 DT104 strains were tested for the frequency of variants at each locus after 5 serial passages
by using liquid culture: cultures were diluted 1:1,000 at each passage.
of the AIV through embryos improved it's HA and biological titer but tremendously decreased its antigenicity.