Menu
Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Forums
Cattle Boards
Breeding / Calving Issues
Premature calves
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support CattleToday:
Message
<blockquote data-quote="Lucky_P" data-source="post: 1840496" data-attributes="member: 12607"><p>Here in western KY, with that presentation, Neospora would be Candidate #1, 2, and maybe #3. Lots of coyotes and roaming dogs. </p><p>Over 25 years in the diagnostic lab here, I could count on one hand the number of confirmed Lepto abortions I saw. But... feral hogs are not (yet) a significant issue here in the western half of the state. In 30 years, I only saw one IBR abortion that was not vaccine-related. Have only seen photos of fungal abortion due to consumption of moldy hay - never saw one in person - and I'm sure that there's plenty of moldy hay fed here.</p><p></p><p>If you're going to pursue diagnostics, fetus, PLACENTA, and paired (acute & convalescent) maternal serum samples can be helpful. If I had to choose only one, I prefer placenta.</p><p>But... over time, definitive diagnosis rate on most abortion/stillbirth cases is distressingly low - 25% or less... but we can 'rule out' the things that the producer can do something about.</p><p></p><p>A positive Lepto titer to one or more serovars in a vaccinated cow is to be expected. A single (acute) sample is of little significance in a vaccinated cow - but if you pull a convalescent sample 3 weeks or so later, antibody levels may be higher or lower, giving a better inclination as to whether a particular Lepto serovar was actually involved. If titer levels stay the same... it's probably just a vaccine-induced titer.</p><p>Lepto hardjo-bovis (HB on your vaccine/bacterin bottle), which is the 'cattle-adapted' strain (cattle are the source/carriers) primarily causes early embryonic death... cows go through 3, 4 or more cycles, conceiving and then aborting the embryo, before they finally 'stick'. Mid-to-late term Lepto abortions will generally be due to one of the other Lepto strains, and infected cows will not be persistently infected 'carriers' like those infected with hardjo-bovis.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1840496, member: 12607"] Here in western KY, with that presentation, Neospora would be Candidate #1, 2, and maybe #3. Lots of coyotes and roaming dogs. Over 25 years in the diagnostic lab here, I could count on one hand the number of confirmed Lepto abortions I saw. But... feral hogs are not (yet) a significant issue here in the western half of the state. In 30 years, I only saw one IBR abortion that was not vaccine-related. Have only seen photos of fungal abortion due to consumption of moldy hay - never saw one in person - and I'm sure that there's plenty of moldy hay fed here. If you're going to pursue diagnostics, fetus, PLACENTA, and paired (acute & convalescent) maternal serum samples can be helpful. If I had to choose only one, I prefer placenta. But... over time, definitive diagnosis rate on most abortion/stillbirth cases is distressingly low - 25% or less... but we can 'rule out' the things that the producer can do something about. A positive Lepto titer to one or more serovars in a vaccinated cow is to be expected. A single (acute) sample is of little significance in a vaccinated cow - but if you pull a convalescent sample 3 weeks or so later, antibody levels may be higher or lower, giving a better inclination as to whether a particular Lepto serovar was actually involved. If titer levels stay the same... it's probably just a vaccine-induced titer. Lepto hardjo-bovis (HB on your vaccine/bacterin bottle), which is the 'cattle-adapted' strain (cattle are the source/carriers) primarily causes early embryonic death... cows go through 3, 4 or more cycles, conceiving and then aborting the embryo, before they finally 'stick'. Mid-to-late term Lepto abortions will generally be due to one of the other Lepto strains, and infected cows will not be persistently infected 'carriers' like those infected with hardjo-bovis. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Breeding / Calving Issues
Premature calves
Top