Dear Bakri,
Thank you very much for sharing your experience.
Thank you for your great help and support for our customers through your excellent experience.
Dr. Husam Bakri, very good information. In India also we are finding a lot of cases of HP and LP IE AI. We are not having vaccine for AI. So we are losing heavily in layers and breeders.
Any concrete steps for AI?
Dr. Prafull Zade.
Dear Dr. Zade,
First, thank you for your email. Actually in our area AI H9N2 vaccine did a very good job to reduce the losses from AI H9N2, for sure with good biosecurity, good farm management with good vaccination program against other diseases like ND and IB virulent strains.
We had very good experience when the vaccine is not available in the market farmers were using good vaccination program against ND which they could reduce the losses from AI H9N2. Regarding HPAIV there is a study done by South Poultry Research Laboratory USDA/ARS, Athens, GA, USA. Showing when there is mNDV has replication advantage it is able to interfere with a second virus infection, most likely by inducing an antiviral state due to the activation of innate immune mechanisms that prevent host cells from being infected by a second virus.
You can see the full study on World Poultry SEP. 2014.
All the best and hope I was able to answer your question.
Dear Dr. Bardot,
First thank you for your comments. From our field experience, over 18 years using this vaccines, yes, it gives very good protection against H9N2, which is always challenging the breeders and layers when the production is going to the peak.
No H9N2 vaccine will not give cross protection against other AI serotype.
All the best
Bakri
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