TABLE 1.
Radiation sensitivity of three Salmonella isolates in planktonic and biofilm-associated forms
| Isolate (serovar) | Culture | CFU/ml (log10)a | Radiation D10 (kGy)b | R2 | 5-log10 dose (kGy)c |
|---|---|---|---|---|---|
| Anatum | Planktonic | 8.98 | 0.677 ab | 0.94 | 3.385 |
| Biofilm | 5.98 | 0.645 a | 0.96 | 3.225 | |
| Enteritidis | Planktonic | 9.15 | 0.535 c | 0.98 | 2.675 |
| Biofilm | 6.25 | 0.436 d | 0.97 | 2.180 | |
| Stanley | Planktonic | 9.08 | 0.591 b | 0.99 | 2.955 |
| Biofilm | 6.30 | 0.531 c | 0.95 | 2.655 |
a
Cell density in the nonirradiated control samples, log10 CFU/ml.
b
D10 values among the six isolate-culture combinations followed by the same letter are not significantly different (analysis of covariance, P < 0.05).
c
The dose required to achieve a 5-log10 (99.999%) reduction in population.