Nobilis Gumboro 228E: Trial Data

Field Study, France

Permission was granted by the French government to use Gumboro 228E against a series of vvIBD outbreaks in a major poultry producing region of France.

Performance data was collected from over 170 million broilers, comprising:

• 151 flocks prior to the outbreak.
• 237 flocks during the outbreak, vaccinated with an intermediate vaccine.
• 252 flocks vaccinated with Gumboro 228E during the outbreak.

Results

• Intermediate vaccines failed to prevent fresh outbreaks.
• Gumboro 228E provided effective protection.
• Profitability of flocks vaccinated with 228E returned to the levels recorded prior to the Gumboro outbreak.

Gumboro 228E trials in Thailand

Two trials were conducted with commercial broiler flocks in Thailand, comparing the effects of vaccination with Gumboro 228E and a widely used "hot" vaccine. In Trial 1, vaccination was at 14 days, in Trial 2, at 14 and 21 days.

• Both vaccines controlled Gumboro, but the 228E-vaccinated flocks performed better.
• Flocks vaccinated with the "hot" vaccine showed an incidence of bursal atrophy 3.5 times higher than those vaccinated with 228E.
• Conclusion: 228E provides effective protection with minimal bursal damage and no negative effect on performance.