TABLE 1.
Virusa | Slope (±SE) for incubation at: |
||||
---|---|---|---|---|---|
37°C (log10 PFU/h)b |
55°C (log10 PFU/min) |
||||
Egg grown | MDCK grown | Linearc | Stabled | Sensitived | |
A/Mallard/Alberta/77/1977 (P2E1) | −0.031 ± 0.003* | −0.031 ± 0.002* | −0.031 ± 0.004 | −0.005 ± 0.003 | −0.078 ± 0.005 |
A/Mallard/Alberta/376/1985 (P1E1) | −0.038 ± 0.001† | −0.041 ± 0.001† | −0.053 ± 0.004 | −0.027 ± 0.002 | −0.093 ± 0.003 |
A/Mallard/Alberta/353/1988 (P2E1) | −0.028 ± 0.002* | −0.029 ± 0.002* | −0.047 ± 0.003 | −0.029 ± 0.005 | −0.072 ± 0.009 |
A/Mallard/Alberta/201/1996 (P2E1) | −0.026 ± 0.002* | −0.025 ± 0.002* | −0.042 ± 0.002 | −0.032 ± 0.002 | −0.075 ± 0.006 |
A/Mallard/Alberta/205/1998 (P2E1) | −0.039 ± 0.002† | −0.031 ± 0.002* | −0.036 ± 0.006 | −0.010 ± 0.004 | −0.120 ± 0.007 |
A/Mallard/Alberta/226/1998 (E4) | −0.039 ± 0.002† | −0.028 ± 0.001* | −0.047 ± 0.006 | −0.016 ± 0.005 | −0.115 ± 0.010 |
A/Mallard/Alberta/79/2003 (E2) | −0.026 ± 0.002* | −0.036 ± 0.002† | −0.032 ± 0.006 | −0.003 ± 0.004 | −0.125 ± 0.008 |
The passage history of the stock viruses is included in parentheses (P, unknown passage; E, embryonated chicken egg).
Regression analysis suggested two groups for the various slope coefficients; values within a column with the same symbol (* or †) are not significantly different.
Linear fit of the data was not appropriate, but the slopes are included for comparison to the 37°C data.
Segmented regression produced a fit for 2 lines; the shallow slope is the stable fraction of the population, and the steep slope is the sensitive fraction.