Table 2.
Impact of commercial housing system on Salmonella and Campylobacter spp. prevalence in various tissues of laying hens at 77 wk of age.
| Salmonella spp.1,2 | Campylobacter spp.2 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Housing system | Adrenal | Ceca | Follicles | Reproductive tract | Adrenal | Spleen | Ceca | Follicles | Reproductive tract |
| Aviary | 1 (0.83%) | 3 (2.50%) | 1 (0.83%) | 17 (14.17%) | 2 (1.67%) | 97 (80.83%) | 11 (9.17%) | 15 (12.50%) | |
| Conventional cage | 1 (0.83%) | 15 (12.50%) | 6 (5.00%) | 111 (92.50%) | 5 (4.17%) | 12 (10.00%) | |||
| Enriched colony cage | 3 (2.50%) | 3 (2.50%) | 6 (5.00%) | 1 (0.83%) | 108 (90.00%) | 2 (1.67%) | 7 (5.83%) | ||
| P-value | NS4 | <0.0001 | <0.05 | NS | <0.05 | NS | <0.05 | <0.05 | NS |
| Column total3 | 2 (0.56%) | 21 (5.83%) | 3 (0.83%) | 1 (0.28%) | 29 (8.08%) | 3 (0.83%) | 316 (87.78%) | 18 (5.00%) | 34 (9.44%) |
1No Salmonella spp. were detected in any spleen samples.
2Number and percentage of 120 hens within a housing system positive at 77 wk of age for the selected pathogen within the target tissue.
3Number and percentage of the complete set of 360 hens tested across housing systems positive at 77 wk of age for the selected pathogen within the target tissue.
4NS = not significant (P > 0.05).