Submitted to: Poultry Science Association Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: September 23, 1996
Publication Date: N/A
In this study, we evaluated the ability of a commercially prepared defined competitive exclusion culture (CF3) to decrease the horizontal spread of S. gallinarum. Day-old commercial chicks were assigned either to a control group or CF3 treated group. Treated chicks were provided 0.25 ml of the culture/chick by oral gavage. On day three, 20 chicks/group were challenged with 0.5 ml of a culture containing 10**6 S. gallinarum/ml. Ten days later, chicks that remained were killed by cervical dislocation and examined for S. gallinarum cecal colonization in the first study and cecal colonization and organ invasion in a second study. The experiment was replicated on two separate occasions. In the first experiment, mortality was 75% (15/20) for seeders and 40% (16/40) for contact chicks in the control group, and 0% (0/20) for both seeder and contact chicks (0/40)in the CF3 treated group. In the second experiment, mortality was 45% (9/20) for seeders and 10% (4/40) for the contact chicks in the control group while in the CF3 treated group mortality was 0% (0/20) for seeders and 0% (0/40) for contacts. Data indicate that the CF3 commercial preparation significantly protected against the horizontal spread of S. gallinarum and may be an effective way of reducing economic losses associated with this avian pathogen.