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Some dogs can carry harmful bacteria without showing symptoms, making certain infections hard to detect. These hidden infections can sometimes cause serious health problems and may even pose risks to people.
Brucellosis in dogs is a contagious bacterial infection most commonly caused by Brucella canis. It mainly affects reproductive health, potentially causing infertility, pregnancy loss, and other complications. Understanding the disease can help owners recognize possible exposure and seek veterinary care.
What Causes Brucellosis in Dogs?
Dogs become infected when Brucella bacteria enter their bodies through contact with infected animals or contaminated bodily fluids.
The infection commonly spreads through:
- Mating with an infected dog
- Contact with semen or vaginal discharge
- Exposure to fluids and tissues associated with miscarriage or birth
- Contact with infected urine or contaminated materials
Dogs involved in breeding activities may face greater exposure because reproductive fluids are a major route of transmission.
Symptoms of Brucellosis in Dogs
The symptoms depend on the dog’s health, sex, and stage of infection. Some infected animals may show no noticeable signs.
Possible symptoms include:
- Infertility or difficulty breeding
- Miscarriage or stillbirth
- Swollen or painful testicles
- Enlarged lymph nodes
- Persistent back pain or stiffness
- Difficulty walking
- Unusual tiredness
In some cases, the bacteria can infect spinal structures, causing ongoing pain or mobility problems.
Can Dogs Have Brucellosis Without Symptoms?
Yes. Some dogs remain active and appear healthy despite carrying the infection.
This makes brucellosis in dogs especially concerning in breeding facilities, shelters, and households where infected animals may have close contact with other dogs.
A healthy appearance alone cannot rule out infection.
How Is Brucellosis Diagnosed?
Veterinarians may use blood tests to identify antibodies associated with Brucella infection.
Depending on the findings, veterinarians may recommend additional testing, such as PCR or bacterial culture.
Because no single test is perfect in every situation, follow-up testing may be necessary to confirm the diagnosis.
Treatment for Brucellosis in Dogs
Canine brucellosis can be difficult to eliminate.
Veterinarians may prescribe antibiotics in selected cases, but treatment does not always clear the bacteria, and infections can return.
Neutering may help reduce reproductive transmission but does not guarantee a cure.
Infected dogs should not be bred. Owners should work closely with their veterinarian to understand long-term management, infection-control precautions, and any local requirements.
Can Humans Catch Brucellosis From Dogs?
Yes. Brucellosis in dogs is a zoonotic disease, meaning the bacteria can sometimes spread from infected animals to people.
Human infections with Brucella canis are uncommon, but exposure can occur through infected reproductive fluids, blood, or contaminated materials.
Symptoms in humans may include fever, fatigue, headaches, muscle pain, and joint discomfort.
Anyone who suspects exposure should seek medical advice and mention possible contact with an infected dog.
How Can You Prevent Brucellosis?
Prevention focuses on reducing exposure and identifying infected dogs before they can transmit the bacteria.
Helpful precautions include:
- Testing breeding dogs before mating
- Avoiding breeding animals with unknown infection status
- Using protective gloves when handling potentially infected reproductive materials
- Maintaining proper cleaning and hygiene practices
- Seeking veterinary testing after suspected exposure
No commercially available vaccine currently exists for canine brucellosis.
Supporting Your Dog’s Preventive Health
Although brucellosis requires veterinary management, maintaining a regular preventive-care routine remains important for overall dog health.
At 79Pets, owners can explore dog flea, tick, and intestinal worm protection products based on their pet’s age, weight, and individual needs.
Explore dog parasite-control products at 79Pets.
Remember that flea treatments and dewormers do not prevent or treat brucellosis.
When Should You Contact a Veterinarian?
Arrange veterinary care if your dog experiences unexplained reproductive problems, pregnancy loss, swollen testicles, persistent back pain, or possible exposure to an infected animal.
Tell the veterinary clinic about suspected brucellosis before you arrive so they can take appropriate precautions.
Final Thoughts
Brucellosis in dogs can affect reproductive health and occasionally expose humans to infection. Because some infected dogs appear completely healthy, recognizing potential risks is especially important.
Responsible breeding, appropriate testing, good hygiene, and veterinary guidance can help reduce the spread of this bacterial disease.
Related Dog Health Articles
- Can Dogs Carry Infectious Diseases Without Showing Symptoms?
- Leptospirosis in Dogs: Symptoms, Transmission, Treatment & Prevention
- How Long Is a Dog Contagious After an Infectious Disease?
