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Health & Nutrition
Stop Using Modified Live Vaccines-------Abort
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<blockquote data-quote="milkmaid" data-source="post: 967775" data-attributes="member: 852"><p>Yes and no on this one guys. The article in the link above has some parts right, but has misquoted at least one veterinarian in there. I just received an email back; he was one of my favorite undergrad instructors and he sent me the JAVMA article where the findings were originally published. Yes, they did have a 25% incidence of abortion between 40 and 60 some days after vaccination, and yes all fetal tissues tested had IBR virus present. No, it was not linked to early embryonic death. The first calf heifer group had been vaccinated in previous years prior to breeding and then at ~5-6 months of gestation, and in previous years they had not had problems with that protocol. The year that they had problems, the heifer group was vaccinated at 7-8 months of gestation (after having been vaccinated 3x pre-breeding following labeled instructions). Other veterinarians had found a increased incidence of abortion when animals were vaccinated with the MLV after ~5.5 months of gestation. Earlier than that did not cause abortion.</p><p></p><p>The issue with the MLV containing IBR is not that they decrease pregnancy rates (early embryonic death), but that they have been linked to an increased incidence of third-trimester abortion - and not immediately after vaccination; it was >40 days after vaccination. Still safe to give pre-breeding. No indication they are going to cause disease directly or indirectly with first/second trimester vaccination.</p><p></p><p>Don't throw the baby out with the bathwater here- MLV are still excellent choices for a vaccine protocol and do provide long-lasting, good protection.</p></blockquote><p></p>
[QUOTE="milkmaid, post: 967775, member: 852"] Yes and no on this one guys. The article in the link above has some parts right, but has misquoted at least one veterinarian in there. I just received an email back; he was one of my favorite undergrad instructors and he sent me the JAVMA article where the findings were originally published. Yes, they did have a 25% incidence of abortion between 40 and 60 some days after vaccination, and yes all fetal tissues tested had IBR virus present. No, it was not linked to early embryonic death. The first calf heifer group had been vaccinated in previous years prior to breeding and then at ~5-6 months of gestation, and in previous years they had not had problems with that protocol. The year that they had problems, the heifer group was vaccinated at 7-8 months of gestation (after having been vaccinated 3x pre-breeding following labeled instructions). Other veterinarians had found a increased incidence of abortion when animals were vaccinated with the MLV after ~5.5 months of gestation. Earlier than that did not cause abortion. The issue with the MLV containing IBR is not that they decrease pregnancy rates (early embryonic death), but that they have been linked to an increased incidence of third-trimester abortion - and not immediately after vaccination; it was >40 days after vaccination. Still safe to give pre-breeding. No indication they are going to cause disease directly or indirectly with first/second trimester vaccination. Don't throw the baby out with the bathwater here- MLV are still excellent choices for a vaccine protocol and do provide long-lasting, good protection. [/QUOTE]
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Stop Using Modified Live Vaccines-------Abort
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