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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.

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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.

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• 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.

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