TABLE 1.
Prevalence of Salmonella in flock A during longitudinal sampling
| Collection no. | Week of lay | No. of positive isolates/total no. of indicated sample type |
Sample type(s) and Salmonella serovar(s) (no. of isolates)a | |||
|---|---|---|---|---|---|---|
| Eggshells | Feces | Egg belt | Dust | |||
| 1 | 36 | 0/33 | 0/7 | 0/7 | 1/5 | Dust: S. Typhimurium PT 9 |
| 2 | 40 | 0/33 | 0/7 | 1/7 | 1/5 | Egg belt and dust: S. Worthington |
| 3 | 44 | 0/30 | 1/7 | 0/7 | 3/5 | Feces and dust: S. Typhimurium PT 9 |
| 4 | 48 | 0/30 | 0/7 | 0/7 | 0/5 | |
| 5 | 52 | 0/30 | 0/7 | 0/7 | 1/5 | Dust: S. Typhimurium PT 9 |
| 6 | 56 | 0/30 | 0/7 | 0/7 | 1/5 | Dust: S. Typhimurium PT 9 |
| 7 | 60 | 0/32 | 1/7 | 1/7 | 1/5 | Feces: S. Worthington; egg belt: Salmonella subsp. 1 serotype 4,5,12; dust: S. Typhimurium PT 9 |
| 8 | 64 | 0/28 | 1/7 | 1/7 | 0/5 | Feces: S. Worthington; egg belt: Salmonella subsp. 1 serotype 4,5,12:-:- |
| 9 | 68 | 2/7 | 1/7 | 2/5 | Feces and egg belt: S. Worthington; dust: S. Worthington (1), S. Typhimurium PT 9 (1) | |
| 10 | 72 | 1/10 | 0/7 | 1/7 | 3/5 | Egg: S. Worthington; egg belt: S. Typhimurium PT 9; dust: S. Typhimurium PT 9 (2), S. Worthington |
a
PT, phage type.