Layer immune health control programs go beyond single fix

Immune health is one of those topics everyone agrees matters, yet it’s easy to oversimplify until a flock starts slipping in ways you can’t explain. We’re joined by William Stanley, senior key account veterinarian with Boehringer Ingelheim, to get practical about what “strong immunity” really means for layer flock health and day to day decision making on farms.

We start with what Stanley calls the immune health triad (also known as the disease triad): the host bird, the pathogen and the environment. That simple model helps us make sense of messy real-world cases where more than one factor is changing at once. We talk through the immunology terms vets use, the classic immunosuppressive threats like infectious bursal disease and chicken anemia virus, and why emerging pressures can look like “everything is off” instead of one clear diagnosis.

Then we dig into what’s keeping poultry veterinarians up at night, including renewed attention on Marek’s disease and the idea that field strains may be evolving in ways that drive immunosuppression even with solid vaccination and good technique. From there, we lay out control strategies that go beyond a single fix: tightening vaccine programs, checking air quality and other environmental stressors, and staying alert to feed risks like mycotoxins. We also connect immune status to food safety, since opportunistic bacteria such as Salmonella, Campylobacter and E. coli can take advantage when immunity is compromised.

If you care about layer performance, disease prevention, vaccination strategy, and practical poultry health management, this conversation will give you a clearer framework and smarter questions to ask. Subscribe, share the episode with a colleague, and leave a review with the immune-health challenge you’re seeing most right now.

Transcript

Inside The Vet Breakfast Seminar

SPEAKER_00 0:07

Layer flock health and how best to address issues from an immune health standpoint is always top of mind for producers and poultry veterinarians. Welcome to Feedstuffs in Focus, our podcast taking a look at the big issues affecting the livestock poultry grain and animal feed industries. I'm your host, Sarah Muirhead. Joining us to discuss immune health in layers is William Stanley, senior key account veterinarian with Barringer Ingelheim. All right, Bill, the the poultry industry recently gathered in Minneapolis for peak, and there was surely much discussion around various topics. I understand that you folks had a layer veterinarian breakfast seminar and you really dug into the topic of immune health. Talk to us about what it is that you did and how you how you brought together veterinarians to have a discussion around immune health.

SPEAKER_01 0:57

Sure, Sarah. Thank you for asking me and thank you for hosting me on this important topic. And yes, we had a group of about 14 veterinarians from the layer industry. And these they were invited to come to this breakfast seminar that we had. And there they were at first shown a presentation about immune health. And we talked to them a little bit about immunology and some of the terms that we use in immune health, and also a refresher on what are some of the pathogens that cause problems with immunity, specifically pathogens like infectious burstal disease and Merik's virus and chicken anemia virus, but also other things such as environmental stressors that can contribute to overall immune health problems. So we went through that and then we shared with them some case scenarios that we had come up with. These were hypothetical case scenarios and divided the group up, and they worked through these case scenarios, and then we shared them all as a whole group at the end. So it was well received, and many of the attendees said they would like to have something like this again next year. So we're excited about the possibility of doing this again next year at peak.

SPEAKER_00 2:25

Always valuable information that exchanges when you sit and sit down and talk. And I'm assuming there was quite a collection of new and veteran veterinarians that were there in the room and learning from each other.

The Immune Health Triad

SPEAKER_01 2:38

That's correct. So we we did take that into account when we were dividing the teams up, for example. We we mixed them up so that some of the more veteran members would be split out across all three teams. And yes, I think the feedback we had was was from the veterans that were there, but also from the the newer veterinarians in the field. And it was it was good feedback, and we're we're excited about that. And hopefully we'll be able to do something like this again next year.

SPEAKER_00 3:14

Now, immune health, it's it's a complicated subject. Any any key learnings that came out of those discussions? Anything that you're you were kind of like those aha moments?

SPEAKER_01 3:26

I would say yes, there were several things that came out of the discussions in terms of immune health. And you're right, it is a complicated subject, but when you break it down into its parts of the what we call the immune health triad or disease triad, where you have really three factors that go into whether or not a flock will break with a disease. And those three factors are the host or the bird, the pathogen or the microorganism that causes a disease, and then the environment. So you can really have a breakdown in any of those three or a combination of those three, and it results in disease. So we emphasize that with the group. And yeah, there was there was good feedback from that. And you know, we we that's our goal in this is to provide the industry with helpful information that they can use and go back to their respective companies and look look at ways and of improving bird health and flot performance.

SPEAKER_00 4:34

So when it comes to practical approaches to managing common and emerging health issues in layer flocks, what would you say were some of the key topics that either came out in the seminar or perhaps you picked up in discussions around peak? What are what's kind of keeping veterinarians up at night?

Marek’s Disease And Viral Evolution

SPEAKER_01 4:51

Great question. And as veterinarians, we we were already always thinking about the the usual things, you know, that we deal with. Uh, and those could be things like bronchitis viruses or uh Newcastle Rheoviruses, you know, chicken anemia virus. But an interesting thing that we've been watching in the last um, I don't know, a few years is what's happening with Merricks disease. And the industry is very clear on the fact that Merricks disease viruses change over time. And we've known this since the the late 60s when Merrick's virus vaccines first came on the market, and they really helped the industry tremendously. And the biggest problem at that point was prevention of tumor formation, and the vaccines did a great job of that, and they have done that for the you know many years now. But what we're asking ourselves now is whether or not the field merits viruses have evolved to a point where perhaps they're not really causing tumors so much in the face of good vaccination, but causing immunosuppression. So we've been exploring that possibility, and there's some good evidence out there to say that that is the case, that some of the field viruses are capable of causing immunosuppression, even in the face of good vaccines and good vaccination technique.

Control Strategies Beyond Pathogens

SPEAKER_00 6:32

Things evolve, and that uh is always can be a challenge when that does happen. So when we talk about control strategies for for health challenges and layer flocks, what uh what can producers do to mitigate and and solve for those?

SPEAKER_01 6:49

Yeah, so with immune health, it's one of these areas where you have to pay attention to the details when you're focusing on immune health and improving that in your flock. So it's and it's uh one of these areas where you've got to focus on not just one area, but several. The the more common things is that we think about as veterinarians, of course, are the pathogens. And I mentioned those earlier of things like infectious burstal disease virus and chicken anemia virus and merits. And there are many other viruses too that have a little bit of immunosuppressive component to them, such as adenoviruses, and even a new one to the U.S., these the new uh metanumoviruses that we're seeing now, they also have a little bit of immunosuppressive component to them. But you have to also consider the environmental factors, such as air quality and even things like mycotoxins. Some of these can be immunosuppressive as well. So when you're exploring and trying to identify a situation with immunosuppression in a flock, you've got to think about all these factors. And then as a veterinarian, what are the ones that you can control? And thankfully, with good vaccines that we have now, we can control many of these immunosuppressive pathogens. So you have to look at those and ask yourself as a veterinarian, okay, well, these are the areas I can control. And I've got to make sure that my vaccine program is up to speed and that it's going to protect my flocks as best as possible from what they might be faced with in the field in terms of immunosuppressive viruses.

Food Safety And Closing Advice

SPEAKER_00 8:41

And of course, paying attention to all aspects of flock health is best for the birds and for producers, bottom line. But I'm uh assuming there's also a benefit that extends over into food safety as well. Is that correct?

SPEAKER_01 8:54

Yes, there is, and that's a great point, Sarah. Food safety oftentimes is caused by what we call opportunistic pathogens. And these are primarily bacteria, such as E. coli and um Campylobacter, or you know, there are a number of uh salmonella is a is a big food safety bacteria as well. And when you have a flock that's immunocompromised for whatever reason, well, these bacteria then have an opportunity to get a foothold and cause problems. And yes, potentially that could result in a food safety issue. So it's yet another reason to have your immune health of your flocks uh you know up to speed and uh as protected as possible.

SPEAKER_00 9:46

Very good. Any final thoughts to leave our audience with here today, Bill?

SPEAKER_01 9:51

I would just say that when you're developing your vaccine programs and you're thinking about immune health as a company veterinarian, make sure you get in touch with your allied industry partners. You know, we we're here to help you and we're here to provide information about the vaccines we provide or what other services we provide, and let us know. We're here to help, and we'd love to help you develop your programs to give you the best assurance for optimal flock health.

SPEAKER_00 10:24

Our thanks to William Stanley of Ballringer Ingelheim for joining us here today. I'm Sarah Muirhead, and you've been listening to Feedstuffs in Focus. If you would like to hear more conversations about some of the big issues affecting the livestock, poultry grain, and animal feed industries, subscribe to this podcast on your favorite podcast channel. Until next time, have a great day and thank you for listening.