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<blockquote data-quote="Lucky_P" data-source="post: 1816330" data-attributes="member: 12607"><p>[USER=498]@Dave[/USER] - 103! There is no way in hell that I'd have worked or weaned calves in that sort of heat. It's a wonder you didn't have some heat-related deaths, and the likelihood is that their immune response to that huge, varied, antigenic mass you plugged into them (Ultrabac-8, BoviShield Gold, Nasalgen, Pasteurella - all at one fell swoop) may be less than optimal, at best. </p><p>You may have 'vaccinated' those calves, but you may not have 'immunized' them... th next person up the chain may get an ugly surprise if they're expecting protection against BRD based on their 'vaccination history'. </p><p></p><p>Hope you kept your vaccines cool and protected from sunlight. I still remember the guy who talked about his pistol-grip syringe being so hot that it nearly burned his hand while vaccinating calves on a hot day with temps in the 90s... it's a sure bet that the MLV vaccines administered that day were DOA, and immune response was near zero. </p><p></p><p>If daytime temps are above 85 and don't cool down below 70 at night, cattle can't 'cool down' sufficiently to overcome heat stress... there's a high likelihood of vaccine 'failure' - and the possibility of adverse effects resulting in death.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1816330, member: 12607"] [USER=498]@Dave[/USER] - 103! There is no way in hell that I'd have worked or weaned calves in that sort of heat. It's a wonder you didn't have some heat-related deaths, and the likelihood is that their immune response to that huge, varied, antigenic mass you plugged into them (Ultrabac-8, BoviShield Gold, Nasalgen, Pasteurella - all at one fell swoop) may be less than optimal, at best. You may have 'vaccinated' those calves, but you may not have 'immunized' them... th next person up the chain may get an ugly surprise if they're expecting protection against BRD based on their 'vaccination history'. Hope you kept your vaccines cool and protected from sunlight. I still remember the guy who talked about his pistol-grip syringe being so hot that it nearly burned his hand while vaccinating calves on a hot day with temps in the 90s... it's a sure bet that the MLV vaccines administered that day were DOA, and immune response was near zero. If daytime temps are above 85 and don't cool down below 70 at night, cattle can't 'cool down' sufficiently to overcome heat stress... there's a high likelihood of vaccine 'failure' - and the possibility of adverse effects resulting in death. [/QUOTE]
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