Parliamentary Papers, Band 8 |
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As a result of improved control by these means each outbreak recorded from countries where these arrangements are followed no longer represents a source of heavy or continuing infection and the spread of virus within the herd is minimal ...
As a result of improved control by these means each outbreak recorded from countries where these arrangements are followed no longer represents a source of heavy or continuing infection and the spread of virus within the herd is minimal ...
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For the control of virus diseases two types of vaccine can be considered ; one in which the virus has been inactivated , and the other a live vaccine prepared from a modified or attenuated strain of virus . Which- ever type of vaccine ...
For the control of virus diseases two types of vaccine can be considered ; one in which the virus has been inactivated , and the other a live vaccine prepared from a modified or attenuated strain of virus . Which- ever type of vaccine ...
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and duration of immunity , in the study of the growth and properties of attenuated strains , in genetic studies on virus populations and in the isola- tion of genetically marked substrains . Tissue culture techniques may also be used ...
and duration of immunity , in the study of the growth and properties of attenuated strains , in genetic studies on virus populations and in the isola- tion of genetically marked substrains . Tissue culture techniques may also be used ...
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31st March Account acres addition agricultural aircraft amount animals application arrangements Association authority average B.SC Balance beef Board breeders British bulls calves carried cattle cent changes Charollais Committee Company concerned considerable considered continued Corporation cost cows crops cross dairy Department disease effect equipment Estate expenditure Expenses experimental experiments factors Farm field Food fruit further given grant growth Head herds important improvement increase Institute interest land less Limited loss material methods milk necessary obtained Office operations passenger period Ph.D plant breeding possible potatoes present problems production profit properties proposed protection received relation Report Research routes scheme Scotland Scottish seed selection staff Station strains supply Table traffic trials United United Kingdom variety virus