TABLE 1.
Viable counts of S. enterica serovar Typhimurium in the cecal contents, spleens, and livers of line N and line 61 chickens infected 40 days after hatching
| Day p.i. | Line N
|
Line 61
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cecal contents
|
Spleen
|
Liver
|
Cecal contents
|
Spleen
|
Liver
|
|||||||
| Mean log10 CFU/g (SEM) | No. positive | Mean log10 CFU/g (SEM) | No. positive | Mean log10 CFU/g (SEM) | No. positive | Mean log10 CFU/g (SEM) | No. positive | Mean log10 CFU/g (SEM) | No. positive | Mean log10 CFU/g (SEM) | No. positive | |
| 6 | 4.38 (0.21) | 5/5a | 2.61 (0.27) | 5/5 | 2.66 (1.44) | 5/5 | 4.00 (0.45) | 5/5 | 3.01 (0.269) | 5/5 | 2.58 (0.25) | 5/5 |
| 13 | 3.03 (0.48)b | 5/5 | 1.4 (0.6) | 3/5 | 0.9 (0.55) | 2/5 | 0.4 (0.4)b | 1/5 | 1.29 (0.79) | 2/5 | 1.2 (0.49) | 3/5 |
| 20 | 2.63 (0.75)b | 4/5 | 0.89 (0.55) | 2/5 | 0.9 (0.55) | 2/5 | 0 (0)b | 0/5 | 0 (0) | 0/5 | 0 (0) | 0/5 |
| 27 | 1.6 (0.4)b | 4/5 | 0 (0) | 0/5 | 0.87 (0.87) | 1/5 | 0 (0)b | 0/5 | 0 (0) | 0/5 | 0.4 (0.4) | 1/5 |
a
Number positive/total number.
b
There was a significant difference (P < 0.05) between line N and line 61 chickens at this time postinfection (as determined by Student's t test).