HVT Newcastle Vector Vaccine Laboratory Expertise
Dr Jack K. Rosenberger, president of Aviserve LLC in the US, presented his work comparing two types of HVT Newcastle disease virus (NDV) vector vaccines administered in-ovo at the Vector Vaccines Symposium organised by Ceva Santé Animale in San Diego in October 2010.
11 February 2011
2 minute read
Commercial broilers with Newcastle disease virus maternally derived immunity have been vaccinated in ovo with two kinds of HVT NDV vector vaccines. The control group just received a conventional HVT + SB1 vaccine.
The birds have been challenged at different ages 7, 14, 21, 28 and 35 days post hatch with Newcastle disease virus B1, by ocular route, 3.5 log10 EID50 per bird. The protection has been evaluated by tracheal swabbing five days post challenge and virus re-isolation. Seroconversion has been monitored by HI and by Elisa.
Protection after NDV challenge consistently improved with time for both vector vaccines.
We have observed in that challenge study that the onset of immunity and the percentage of protection induced by Vectormune HVT NDV was more rapid and higher than the other vector vaccine, concluded Dr Rosenberger.
Further Reading
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- | You can view other papers presented at the Vector Vaccines Symposium by clicking here. |
Further Reading
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- | Find out more information on Newcastle disease by clicking here. |
February 2011
