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<blockquote data-quote="Jeanne - Simme Valley" data-source="post: 1494115" data-attributes="member: 968"><p>This is what I had always preached & read - but - new research has proven all this information to be false - supposedly. </p><p>But, here is an excerpt from an article I had in a newsletter:</p><p>"<em>As the calf ages, the colostral immune globulin levels start to drop off over time, and are mostly gone by around 3-4 months of age. This is an important concept to understand for two reasons: First, giving the calf an injectable vaccine before this time frame means that any antigens for diseases you are vaccinating for (IBR, BRSV, PI3, etc.) will be neutralized by the immune globulins delivered in the colostrum. Essentially, if you have vaccinated the pregnant cow for those same diseases, and the calf nursed properly, there is no need to deliver those same vaccines to the calf prior to 4 months of age.</em></p><p><em></em></p><p><em>The second reason not to give an injectable vaccine before this time frame is that the calf's immune system is not ready to see and react to the vaccine. It takes time for the white blood cells responsible for the development of a systemic immune response to learn their jobs and be able to react to invading bugs. <u><strong>One important exception to the use of vaccines in young calves is the use of intra-nasal vaccines. These vaccines provide a localized immunity in the nose very quickly, and are not interfered with by colostral immunity.</strong></u> This is why these vaccines can be given immediately after birth, and at any time in the production cycle safely and effectively.</em>"</p></blockquote><p></p>
[QUOTE="Jeanne - Simme Valley, post: 1494115, member: 968"] This is what I had always preached & read - but - new research has proven all this information to be false - supposedly. But, here is an excerpt from an article I had in a newsletter: "[i]As the calf ages, the colostral immune globulin levels start to drop off over time, and are mostly gone by around 3-4 months of age. This is an important concept to understand for two reasons: First, giving the calf an injectable vaccine before this time frame means that any antigens for diseases you are vaccinating for (IBR, BRSV, PI3, etc.) will be neutralized by the immune globulins delivered in the colostrum. Essentially, if you have vaccinated the pregnant cow for those same diseases, and the calf nursed properly, there is no need to deliver those same vaccines to the calf prior to 4 months of age. The second reason not to give an injectable vaccine before this time frame is that the calf’s immune system is not ready to see and react to the vaccine. It takes time for the white blood cells responsible for the development of a systemic immune response to learn their jobs and be able to react to invading bugs. [u][b]One important exception to the use of vaccines in young calves is the use of intra-nasal vaccines. These vaccines provide a localized immunity in the nose very quickly, and are not interfered with by colostral immunity.[/b][/u] This is why these vaccines can be given immediately after birth, and at any time in the production cycle safely and effectively.[/i]" [/QUOTE]
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