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Extreme temp = sick calves
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<blockquote data-quote="wbvs58" data-source="post: 1471648" data-attributes="member: 16453"><p>We have very few live vaccines available for cattle in Australia our authorities are wary of their use mainly I think due to the fact if they decided to conduct an eradication campaign there would be too many false +ves with testing however we get on fine without them. Pestivirus or BVD as you prefer to call it we only have a killed vaccine for which I use on my replacement heifers ensuring they have 2 doses before joining and an annual booster though I would be very much be in the minority. The clostridals and lepto would be the other ones mostly used though I would think maybe <25% would be vaccinated for it.</p><p></p><p>As True Grit has said the drug companies do have a major push to promote their products and are pushing for people to yard wean prior to weaner sales and to implement their vaccination programmes for a premium price, so far that premium is not obvious.</p><p></p><p>We certainly don't have the problems with BRD that you have there as mostly our cattle are grazing up until entry to the feedlot where they get IBD and MH vaccines on induction.</p><p></p><p>BVD may be more widespread here with up to 80% herds showing evidence however it mostly goes undetected with many farmers just accepting a lower calving rate than what would be achievable though in endemic herds there is not that great a loss with only an occaisional heifer not immune before joining and though may produce a PI will be back to normal on next calf. Animals that get Pestivirus show no sickness and quickly recover fully while on the farm, it is only on entry into the feedlot the stress when they get it lowers immunity and makes them susceptible to BRD.</p><p></p><p>All properties here now are required to have a Biosecurity Plan mainly geared towards Johnes disease however this awareness I am sure will have an impact on these other diseases as if you are on a jbas level of 7 you will not be trading with a property with a jbas level of 6. I think a lot will happen without the use of vaccines, poor drug companies.</p><p></p><p>Ken</p></blockquote><p></p>
[QUOTE="wbvs58, post: 1471648, member: 16453"] We have very few live vaccines available for cattle in Australia our authorities are wary of their use mainly I think due to the fact if they decided to conduct an eradication campaign there would be too many false +ves with testing however we get on fine without them. Pestivirus or BVD as you prefer to call it we only have a killed vaccine for which I use on my replacement heifers ensuring they have 2 doses before joining and an annual booster though I would be very much be in the minority. The clostridals and lepto would be the other ones mostly used though I would think maybe <25% would be vaccinated for it. As True Grit has said the drug companies do have a major push to promote their products and are pushing for people to yard wean prior to weaner sales and to implement their vaccination programmes for a premium price, so far that premium is not obvious. We certainly don't have the problems with BRD that you have there as mostly our cattle are grazing up until entry to the feedlot where they get IBD and MH vaccines on induction. BVD may be more widespread here with up to 80% herds showing evidence however it mostly goes undetected with many farmers just accepting a lower calving rate than what would be achievable though in endemic herds there is not that great a loss with only an occaisional heifer not immune before joining and though may produce a PI will be back to normal on next calf. Animals that get Pestivirus show no sickness and quickly recover fully while on the farm, it is only on entry into the feedlot the stress when they get it lowers immunity and makes them susceptible to BRD. All properties here now are required to have a Biosecurity Plan mainly geared towards Johnes disease however this awareness I am sure will have an impact on these other diseases as if you are on a jbas level of 7 you will not be trading with a property with a jbas level of 6. I think a lot will happen without the use of vaccines, poor drug companies. Ken [/QUOTE]
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