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<blockquote data-quote="Lucky_P" data-source="post: 1334333" data-attributes="member: 12607"><p>Bovine Leukosis Virus is widely distributed; see the most recent (1997) NAHMS bulletin for distribution and prevalence numbers. </p><p></p><p>I've told this before, but will offer it up again. </p><p>I was losing at least one cow per year to lymphosarcoma in the late 90s/early 2000s. My wife (the GOOD veterinarian, and now farm manager) said, 'Look, we've gotta figure out what's going on here." So...in 2007 we bled the entire herd and tested for BLV. 40 of 44 cows were positive; 1 of 4 yearling heifers was positive; 1 of 10 weanling heifers was positive. I had a 90% infection rate in the mature cow herd... and I'm pretty certain that I'm largely responsible for spreading it that completely - by reusing needles between animals. It's a retrovirus, like HIV, so can be transmitted from animal to animal by contaminated needles. You know how much care the human health folks take to prevent needle sticks... think about doing the same with cattle. </p><p></p><p>Since the day those results came back... no female that's been born on this place has received an injection with a needle that's been in another animal (I will reuse needles on steers and the few remaining known infected cows). Yep. That's right. Most needles get used ONCE... No in-and-out of bottles of vaccine/medicine with a needle that's been in an animal.</p><p>Disposable needles are cheap. Yes, it's a PITA to change 'em out... but it's what you need to do to help prevent the further spread of this virus - and other diseases, like anaplasmosis. </p><p></p><p>Sat in on a webinar on anaplasmosis last week... one of the presenters, from Florida, had surveyed beef producers to see how frequently they changed out needles... average was.... after 19 uses. I believe it! That used to be me! I knew better!</p><p>Small-scale study done at KSU... they took an anaplasmosis-infected cow, with 3% infected red blood cells, stuck a needle in her - didn't pull a blood sample - just stuck it in her, then stuck an uninfected cow. Repeated 10 times... 6 of 10 cows that received the 'second' stick became infected. The potential is there for BLV transfer to be just as easy.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1334333, member: 12607"] Bovine Leukosis Virus is widely distributed; see the most recent (1997) NAHMS bulletin for distribution and prevalence numbers. I've told this before, but will offer it up again. I was losing at least one cow per year to lymphosarcoma in the late 90s/early 2000s. My wife (the GOOD veterinarian, and now farm manager) said, 'Look, we've gotta figure out what's going on here." So...in 2007 we bled the entire herd and tested for BLV. 40 of 44 cows were positive; 1 of 4 yearling heifers was positive; 1 of 10 weanling heifers was positive. I had a 90% infection rate in the mature cow herd... and I'm pretty certain that I'm largely responsible for spreading it that completely - by reusing needles between animals. It's a retrovirus, like HIV, so can be transmitted from animal to animal by contaminated needles. You know how much care the human health folks take to prevent needle sticks... think about doing the same with cattle. Since the day those results came back... no female that's been born on this place has received an injection with a needle that's been in another animal (I will reuse needles on steers and the few remaining known infected cows). Yep. That's right. Most needles get used ONCE... No in-and-out of bottles of vaccine/medicine with a needle that's been in an animal. Disposable needles are cheap. Yes, it's a PITA to change 'em out... but it's what you need to do to help prevent the further spread of this virus - and other diseases, like anaplasmosis. Sat in on a webinar on anaplasmosis last week... one of the presenters, from Florida, had surveyed beef producers to see how frequently they changed out needles... average was.... after 19 uses. I believe it! That used to be me! I knew better! Small-scale study done at KSU... they took an anaplasmosis-infected cow, with 3% infected red blood cells, stuck a needle in her - didn't pull a blood sample - just stuck it in her, then stuck an uninfected cow. Repeated 10 times... 6 of 10 cows that received the 'second' stick became infected. The potential is there for BLV transfer to be just as easy. [/QUOTE]
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