Comparison Test of freeze-dried yolk antibodies against IBDV with similar products
Zhang Yakun
Abstract：Each group of 10 18-day-old SPF chicks were injected intramuscularly with overdosage of (10 plume) IBD freeze-dried yolk antibodies or (3 mL) commercially refined liquid yolk antibod-ies respectively, and all chickens were continuously observed for 14d and showed be safe. Each group of 20 18-day-old SPF chicks were injected intramuscularly with 1 plume of the freeze-dried or liquid antibodies respectively, 24 h post injections, chicks were challenged with IBDV TL strains at. Continuously observed for 144 h, survival chicks in this two experimental groups were 20/20, 17/20 respectively, and no chicks suffered from bursal lesions. Two groups of 10 SPF chicks in 18d of age were treated with 1 plume of the two antibodies separately at 12 hpost challenged with IBDV TL strains. Continuously observed for 96 hours, survival chicks of the two experimental groups were 19/20, 17/20. All chicks in the positive control group showed bursal lesions (20/20), and the mortality rate reached 85% (17/20). All chicks in the negative control group were asymptom-atic.
Keywords：Infectious bursal disease virusFreeze-dried yolk antibodyComparison test
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 37-39 )