TABLE 3.
E. coli O157:H7 culture status in fasted-refed and continuously fed cattle
| Time (days) post-E. coli O157:H7 dosea | No. of animals positive/no of animals negativeb
|
|
|---|---|---|
| Fasted-refedc | Continuously fedd | |
| −1 | 0/8 | 0/8 |
| 1 | 8/0 | 8/0 |
| 9 | 7/1 | 7/1 |
| 17 | 2/6 | 6/2 |
| 18 | 5/3 (fasted for 24 h) | 6/2 |
| 19 | 3/5 (refed for 24 h) | 6/2 |
| 21 | 1/7 (refed for 72 h) | 5/3 |
| 24 | 2/6 | 4/4 |
| 30 | 2/6 | 4/4 |
a
Animals were given one oral dose of E. coli O157:H7 on day 0.
b
Fecal samples were cultured for E. coli O157:H7, and the results are expressed as the number of O157 culture-positive animals/the number of O157 culture-negative animals.
c
Animals in this group were fed twice daily and had water ad libitum except on day 17, when feed and water were withheld for 24 h.
d
Animals in this group were fed twice daily and had water ad libitum.