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Blackleg
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<blockquote data-quote="Lucky_P" data-source="post: 795970" data-attributes="member: 12607"><p>robert,</p><p>We had this discussion recently in another thread - I used to be of the opinion that if you got one dose of blackleg vaccine in a calf after 3 months of age, that they were 'good for life'. But, over the past 15 years, I've seen several cases of confirmed blackleg in adult cows that had good histories of being properly vaccinated as calves. So...I presume that, at least in some animals, immunity wanes, and as a result, I 'booster' my adult cow herd against all the Clostridial organisms every 2-3 years; again, while it may be largely unnecessary, it's cheap insurance.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 795970, member: 12607"] robert, We had this discussion recently in another thread - I used to be of the opinion that if you got one dose of blackleg vaccine in a calf after 3 months of age, that they were 'good for life'. But, over the past 15 years, I've seen several cases of confirmed blackleg in adult cows that had good histories of being properly vaccinated as calves. So...I presume that, at least in some animals, immunity wanes, and as a result, I 'booster' my adult cow herd against all the Clostridial organisms every 2-3 years; again, while it may be largely unnecessary, it's cheap insurance. [/QUOTE]
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