May 21, 2026 · 56 min · 11 segments
It’s been a week since we posted Part One of the *Theileria orientalis* *Angus at Work* episode! Have you had a chance to go listen? If not, we welcome you to venture back in time before jumping…
Cassandra OldsGuestAngus at Work HostHostNow, when we have a, an quote, quote, "endemic locations" from the East Coast, you know, throughout kind of middle of, M- Middle East America, right? Uh, I mean, we're importing animals over the last decade that have been positive for Theileria.
Have we had issues? Have we had positives? Yes, of course, we have, because we're importing positive animals almost every day.
But that, that's where what we're seeing today is very different than outbreaks in the pastUh, it's not like the outbreaks that happened in Australia and New Zealand and some of those locations.
It's not like what, what originally was occurring in, in Virginia, uh, early in th- these courses.
What we're seeing today, we've kind of trickled in some of these Theileria, uh, over the last decade, and just now has that competent biologic vector of the Asian long-horned tick has kind of caught up with, [laughs] with the spread of the disease.
We have a host herd within Kansas that has probably been exposed over the last decade.
Uh, but it's the young calves that we're continuously bringing in as feeders and backgrounders and going into the feedlot that the stress of transportation and the stress of marketing, uh, is causing some unforeseen, uh, problems that we really didn't anticipate.
Yeah, and that we didn't see in other states because that's not how they produce their beef, right? They send their beef to us.
It's fascinating how these things evolve and how it changes over time just based on where it, where it impacts next and what that production system looks like.
So I guess Theileria, what, what somebody would see, so if I, if I'm a producer, I'm bringing in animals, or I just have a, a home herd, uh, what is Theileria? What does it matter for me? Or what should I keep my eyes on? Is it may look like very similar in, in some of our mature animals, it may look very similar to something called anaplasmosis, which is a bacterial infection that it actually gets into the blood and, and the red blood cells and causes anemia.
So we can see anemia with Theileria, uh, but anaplas usually i- impacts older animals, older naive cows and bulls, uh, within the, with- within those areas.
With Theileria, we can see it equally almost in, i- if they're all naive, we can see it in older animals or younger animals.
Uh, so it's, it's an equal opportunity employer [laughs] from, from that perspective.
So we, so we can see the traditional jaundice, we can see white mucus membranes, we can see extreme lethargy, uh, just overall not doing well.
Now, when we have a, an quote, quote, "endemic locations" from the East Coast, you know, throughout kind of middle of, M- Middle East America, right? Uh, I mean, we're importing animals over the last decade that have been positive for Theileria.
Have we had issues? Have we had positives? Yes, of course, we have, because we're importing positive animals almost every day.
But that, that's where what we're seeing today is very different than outbreaks in the pastUh, it's not like the outbreaks that happened in Australia and New Zealand and some of those locations.
It's not like what, what originally was occurring in, in Virginia, uh, early in th- these courses.
What we're seeing today, we've kind of trickled in some of these Theileria, uh, over the last decade, and just now has that competent biologic vector of the Asian long-horned tick has kind of caught up with, [laughs] with the spread of the disease.
We have a host herd within Kansas that has probably been exposed over the last decade.
Uh, but it's the young calves that we're continuously bringing in as feeders and backgrounders and going into the feedlot that the stress of transportation and the stress of marketing, uh, is causing some unforeseen, uh, problems that we really didn't anticipate.
Yeah, and that we didn't see in other states because that's not how they produce their beef, right? They send their beef to us.
It's fascinating how these things evolve and how it changes over time just based on where it, where it impacts next and what that production system looks like.
So I guess Theileria, what, what somebody would see, so if I, if I'm a producer, I'm bringing in animals, or I just have a, a home herd, uh, what is Theileria? What does it matter for me? Or what should I keep my eyes on? Is it may look like very similar in, in some of our mature animals, it may look very similar to something called anaplasmosis, which is a bacterial infection that it actually gets into the blood and, and the red blood cells and causes anemia.
So we can see anemia with Theileria, uh, but anaplas usually i- impacts older animals, older naive cows and bulls, uh, within the, with- within those areas.
With Theileria, we can see it equally almost in, i- if they're all naive, we can see it in older animals or younger animals.
Uh, so it's, it's an equal opportunity employer [laughs] from, from that perspective.
So we, so we can see the traditional jaundice, we can see white mucus membranes, we can see extreme lethargy, uh, just overall not doing well.
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