Brahman bulls question

Chapin81

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Bayside NY
I have two young Brahman bulls—half-brothers—who are now showing significant testicular asymmetry, and I'm getting concerned. Both have one testicle that's much larger than the other, and it's always on the same side. The swelling appears persistent and has worsened over time.

When they first arrived, only one bull had a slightly larger testicle, which I assumed was normal. The other had even-sized testicles. But by August 2024, we began noticing that both bulls had one visibly swollen testicle, and the swelling has never really gone down.

One of the bulls also arrived with a copper wire in his ear, like an "earring." I was told it was left over from when he had been "sick" and treated, but it was never removed. The other bull has a similar hole in the same ear, but no wire.

I was just told today both bulls were vaccinated against brucellosis, but now I'm wondering if this could be something more serious—such as testicular hypoplasia or even a heritable issue. I've contacted the breeder, but only spoke with their representative. As a buyer, I was never told about any previous illness, which should have been disclosed or else I would have never purchased them.

To protect the future fertility and genetic integrity of my herd, I'm now seriously considering culling any female calves sired by these bulls—at least until I understand what's going on. I can't afford to let possible reproductive defects pass on to the next generation or am I wrong?

Has anyone experienced something similar—persistent testicular swelling, asymmetry, or any link to certain bloodlines? Could this be genetic, or from a prior infection?

🙏 What would you do in my situation?
You can see one of the bulls one testicle is huge IMO compared to the other. Also none of the bulls are lame and are thin but only because our summers are very dry and forage is low.
 

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I was just told today both bulls were vaccinated against brucellosis,
In the US, brucellosis vaccine is ONLY given to females. Bulls are not supposed to be vaccinated.

This link says "

Vaccination of bulls with RB51

Genital tropism is a potential issue of live vaccines that also affects males and, based on two adverse reports [83], it is not advised to vaccinate bulls with S19 [2, 25]. For RB51, an initial study did not observe side effects after intramuscular administration of a full dose of RB51 to 6 sexually mature bulls [86]. Nevertheless, the study's non-representative route of inoculation and use of the RB51 inhibitory Farrell's medium (see Background) impede conclusions. On the other hand, genital colonization and semen excretion of RB51 have been reported in 1 out of 6 bulls subcutaneously vaccinated with the full dose of RB51 [103]. Manufacturers recommend to use it only in female cattle [53, 104106] and some explicitely indicate not to vaccinate males [95]."
 
In the US, brucellosis vaccine is ONLY given to females. Bulls are not supposed to be vaccinated.

This link says "

Vaccination of bulls with RB51

Genital tropism is a potential issue of live vaccines that also affects males and, based on two adverse reports [83], it is not advised to vaccinate bulls with S19 [2, 25]. For RB51, an initial study did not observe side effects after intramuscular administration of a full dose of RB51 to 6 sexually mature bulls [86]. Nevertheless, the study's non-representative route of inoculation and use of the RB51 inhibitory Farrell's medium (see Background) impede conclusions. On the other hand, genital colonization and semen excretion of RB51 have been reported in 1 out of 6 bulls subcutaneously vaccinated with the full dose of RB51 [103]. Manufacturers recommend to use it only in female cattle [53, 104106] and some explicitely indicate not to vaccinate males [95]."
I have a veterinarian who is traveling there tomorrow to get bloodwork from them and then taking that a lab which is about 4 hours away. If its positive I have to get rid of them which also means Ill have to get my entire herd tested 😭 the vet did say he was going to go over everything with me once onsite maybe prevent this from happening again. I guess I have to be more careful next time when I buy and who is transporting them, I'm kinda pissed off as well since I haven't heard back from the breeder even though I reached out to them to remind them. At least to me it wasn't chump change I spent on purchasing them.
 
As Simme stated bulls are not supposed to be vaccinated for brucellosis in the US. Is it possible for it to be a false positive after they were vaccinated? I definitely would make the breeder answer.
We had a cow test positive around 1980. After 2 whole herd tests they decided it was false. Within a couple year we ended up having to sell everything for slaughter because of a cow we bought off the stockyard that had been tested ok but then came back positive.
I hope things work out.
 
As Simme stated bulls are not supposed to be vaccinated for brucellosis in the US. Is it possible for it to be a false positive after they were vaccinated? I definitely would make the breeder answer.
We had a cow test positive around 1980. After 2 whole herd tests they decided it was false. Within a couple year we ended up having to sell everything for slaughter because of a cow we bought off the stockyard that had been tested ok but then came back positive.
I hope things work out.
good morning Kenny,
Yes, I got some more info on that — it turns out it's only the females. What was suggested to me is to go ahead and check all the females now and cull the ones that need to go. Then toward the end of the year, if there are still a few more in question, cull those as well. I may need to repeat the process sometime next year, but once the herd is clean, I should be good to go.

It was also recommended that I use ag lime around any area where I find a dead fetus and bury it — that actually happened twice this year. Usually the coyotes take care of that, but 🤷‍♂️ I'm going to be much more cautious going forward before bringing in any new cattle to my property.





I actually have a new bull I'm taking possession of in November, but I'm calling that breeder today and will have bloodwork done before bringing him in.
 
In the US, or at least in Virginia they were trying so hard to get rid of it that if one came up positive you had to sell everything to the slaughterhouse. It didn't matter if they tested positive or not. We even had to sell a group of steers on a different farm because we used the same tractor to feed with on both farms. I hope you have better luck than that.
 

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