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Mixed messages from "experts"?
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<blockquote data-quote="bovine" data-source="post: 1820820" data-attributes="member: 12486"><p>You have a low cell count so the great majority of your cows are uninfected. Do you take mastitis cases into account or simply use the CMT? I suspect you could do away with the CMT and put antibiotic in only cows free from mastitis and still get good results.....</p><p></p><p></p><p></p><p>I do appreciate that is a barrier. I don't know how many cows you have, but the savings in dry cow tubes can certainly contribute to that. </p><p></p><p></p><p></p><p>CMT is a useful test for some things. It is widely regarded as being unreliable in early and late lactation. It's main use is identifying infected quarters in cows with a high composite cell count. I use it mainly for identifying subclinical quarters for sampling. These automatic CMT gadgets are ok and give you a ball park figure - but they will also be less reliable early and late in lactation. We have some guys on robots with similar systems and the true cell counts do vary quite a lot in later lactation! You also get some cows that the kit repeatedly believes are high, but that is not reflected in the cell count. </p><p></p><p>The reason I am emphasising this is not because I don't believe you technically can use CMT to decide which cows to give antibiotic - it is that the test is not good enough to use that way. Someone else could come along and read your post and think 'this sounds like a good idea'. It's not. Practical experience of the CMT agrees. The published research shows it is not good enough to use. Personally I would strongly advise a client of mine against doing so.</p></blockquote><p></p>
[QUOTE="bovine, post: 1820820, member: 12486"] You have a low cell count so the great majority of your cows are uninfected. Do you take mastitis cases into account or simply use the CMT? I suspect you could do away with the CMT and put antibiotic in only cows free from mastitis and still get good results..... I do appreciate that is a barrier. I don't know how many cows you have, but the savings in dry cow tubes can certainly contribute to that. CMT is a useful test for some things. It is widely regarded as being unreliable in early and late lactation. It's main use is identifying infected quarters in cows with a high composite cell count. I use it mainly for identifying subclinical quarters for sampling. These automatic CMT gadgets are ok and give you a ball park figure - but they will also be less reliable early and late in lactation. We have some guys on robots with similar systems and the true cell counts do vary quite a lot in later lactation! You also get some cows that the kit repeatedly believes are high, but that is not reflected in the cell count. The reason I am emphasising this is not because I don't believe you technically can use CMT to decide which cows to give antibiotic - it is that the test is not good enough to use that way. Someone else could come along and read your post and think 'this sounds like a good idea'. It's not. Practical experience of the CMT agrees. The published research shows it is not good enough to use. Personally I would strongly advise a client of mine against doing so. [/QUOTE]
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