TABLE 5.
Relative communicabilitiesa of the parental B. avium strain and a nonmotile (Mot−) mutant
| Strain | Total no. of birds | Avg no. of birds infected from an index bird (SD)b |
|---|---|---|
| Parent | 50 | 2.4 (0.39) |
| Mot− | 30 | 1.0 (0.33) |
a
Results of independent measurements with 10 birds per group with a single index case inoculated with approximately 108 CFU, per the standard protocol described in the text.
b
Results analyzed by Student’s t test. The parent was found to be significantly different than the Mot− mutant in an unpaired, two-tailed test (P < 0.05).