Brucellosis in Goats: Abortion, Fertility Problems, and Zoonotic Risk
- See your vet immediately if a pregnant doe aborts, delivers weak kids, or several goats develop reproductive problems in a short time.
- Brucellosis in goats is usually linked to Brucella melitensis, a contagious bacterial disease that can spread through aborted fetuses, placentas, uterine fluids, milk, and close herd contact.
- This is also a zoonotic disease, so people can be exposed during kidding, abortion cleanup, necropsy, or by consuming raw milk or unpasteurized dairy products.
- Diagnosis usually requires herd-level testing directed by your vet and, in many areas, state animal health officials. Testing may include blood serology plus culture or PCR on abortion material.
- Cost range for initial veterinary evaluation and testing is often about $150-$600 for one goat, but herd investigations, lab submission, and regulatory testing can raise total costs to $500-$2,500+ depending on herd size and sampling needs.
What Is Brucellosis in Goats?
Brucellosis is a contagious bacterial disease that affects reproduction in goats. The species most associated with goats is Brucella melitensis, which is well known for causing late-term abortion, stillbirths, weak kids, retained placenta, and reduced fertility. Infected bucks may also develop reproductive tract infection and reduced breeding performance.
This disease matters for two reasons. First, it can spread through a herd during kidding or after an abortion event because the bacteria are shed in placentas, fetuses, uterine discharge, and milk. Second, it is a zoonotic disease, which means people can become infected. Human exposure is most often linked to direct contact with birth fluids or to consuming raw milk or unpasteurized dairy products.
In the United States, Brucella melitensis is not considered established in domestic goat herds, so confirmed cases are unusual and taken very seriously. That said, reproductive losses in goats can look similar across several diseases, so your vet may still include brucellosis on the rule-out list when abortions or fertility problems occur, especially with imported animals, travel, or herd additions.
Symptoms of Brucellosis in Goats
- Late-term abortion, often in the last 2 months of pregnancy
- Stillbirths or weak newborn kids
- Retained placenta or abnormal uterine discharge after kidding
- Reduced conception rates, repeat breeding, or infertility
- Swollen testicles, epididymis, or reduced fertility in bucks
- Drop in milk production after abortion or kidding problems
- Some infected goats may appear normal between reproductive events
See your vet immediately if any doe aborts, especially in late pregnancy, or if more than one goat in the herd has fertility problems, stillbirths, or weak kids. Brucellosis is not the only cause of abortion in goats, but it is important because it can affect herd health and human health. Wear gloves, avoid bare-skin contact with placentas or fluids, isolate affected animals, and do not drink raw milk until your vet helps you sort out the cause.
What Causes Brucellosis in Goats?
Brucellosis in goats is caused by infection with Brucella bacteria, most importantly Brucella melitensis. Goats usually become infected by ingesting contaminated material or through contact with infected reproductive fluids and tissues. The highest-risk materials are aborted fetuses, placentas, vaginal discharge, milk, and contaminated bedding or feed.
The bacteria spread efficiently when goats are housed closely together during kidding season or when abortion material is not removed quickly and safely. New herd additions can also introduce risk, especially if they come from unknown health backgrounds or from regions where brucellosis is more common. Shared equipment, contaminated hands or clothing, and movement of animals between farms can contribute as well.
People are at risk too. Human infection can happen after contact with infected tissues or by consuming unpasteurized goat milk, cheese, or other raw dairy products. Because of that, any abortion storm or unusual reproductive loss in goats should be treated as both a herd-health issue and a biosecurity issue until your vet identifies the cause.
How Is Brucellosis in Goats Diagnosed?
Brucellosis cannot be confirmed by signs alone. Many goat diseases can cause abortion, weak kids, and fertility problems, including chlamydiosis, Q fever, toxoplasmosis, campylobacteriosis, leptospirosis, and nutritional problems. Your vet will usually start with a full herd history, breeding records, abortion timing, travel or purchase history, and a careful exam of affected animals.
Testing often includes serology on blood samples to look for antibodies, along with culture or PCR on placental tissue, fetal tissues, vaginal discharge, or milk when appropriate. Because Brucella organisms are hazardous to people, sample handling and laboratory submission need extra care. Your vet may ask you not to open fetuses or handle tissues without protection.
If brucellosis is suspected, your vet may also involve your state veterinarian or animal health officials, because this disease can be reportable or trigger regulatory follow-up depending on the situation and location. In practice, diagnosis is often a herd-level process rather than a one-goat problem, and the final answer may require repeat testing or official laboratory confirmation.
Treatment Options for Brucellosis in Goats
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Immediate isolation of the doe that aborted and any exposed kidding pen mates
- Gloves, dedicated boots or boot covers, bagging and safe disposal of placentas, fetuses, and contaminated bedding
- Basic veterinary exam plus targeted abortion workup on the most affected animals
- Temporary stop on raw milk use and strict milk handling precautions
- Short-term herd movement pause while your vet guides next steps
Recommended Standard Treatment
- Veterinary-guided herd investigation with blood testing of exposed goats
- Submission of abortion materials for official or reference laboratory testing
- Biosecurity plan for kidding areas, manure, bedding, milk, and visitor traffic
- Coordination with state animal health officials if required
- Segregation or removal of positive or highly suspect animals based on veterinary and regulatory guidance
Advanced / Critical Care
- Whole-herd or multi-group testing with repeat sampling
- Advanced laboratory confirmation and epidemiologic tracing
- Intensive biosecurity overhaul for larger dairies, breeding programs, or exhibition herds
- Consultation with state and federal animal health authorities on quarantine, depopulation, or certification pathways when indicated
- Occupational exposure guidance for farm staff and family members after high-risk contact
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Brucellosis in Goats
Bring these questions to your vet appointment to get the most out of your visit.
- Based on my goats' signs, how high is brucellosis on the list of possible causes of abortion or infertility?
- Which samples should we collect right now from the doe, placenta, fetus, milk, or herd mates?
- Do I need to isolate only the affected doe, or should I separate the whole kidding group?
- Should I stop using or selling raw milk until test results are back?
- Are there reporting requirements in my state if brucellosis is suspected or confirmed?
- Which people on the farm had meaningful exposure, and should they contact their physician?
- If tests are negative, what other abortion diseases should we investigate next?
- What biosecurity changes would most help protect the rest of my herd this season?
How to Prevent Brucellosis in Goats
Prevention starts with biosecurity and herd entry control. Work with your vet to quarantine new goats, review source-herd health records, and avoid bringing in animals with unknown reproductive history. If your herd travels for shows, breeding, or sales, ask your vet what testing and isolation steps make sense before animals rejoin the home herd.
During kidding season, treat all birth fluids and tissues as potentially infectious until proven otherwise. Remove placentas and aborted material promptly, wear gloves, wash hands well, disinfect equipment, and keep dogs, wildlife, and scavengers away from contaminated areas. Separate pregnant does from sick animals when possible, and keep kidding pens clean and dry.
For human safety, do not consume raw milk or unpasteurized dairy products, especially if any goat in the herd has aborted or is under investigation for reproductive disease. Farm workers and family members should use protective clothing when assisting births or cleaning abortion sites. If anyone develops fever or flu-like illness after exposure, they should contact a physician and mention the goat exposure.
There is no one-size-fits-all prevention plan. The best approach is a practical one built with your vet around your herd size, milk use, breeding goals, and local disease risks.