Yes, a dog can absolutely have brucellosis with no symptoms (asymptomatic), yet still carry and spread the bacteria, making it a significant concern for public health and other dogs, as they often show vague or reproductive signs like infertility or miscarriage, but many appear healthy. These symptom-free, infected dogs pose a risk because they can shed bacteria in bodily fluids and tissues, and diagnosis relies heavily on testing rather than visible signs.
Infection in some animals may be asymptomatic; however, shedding of bacteria in feces and urine may still occur. Diagnosis of brucellosis can be made by isolating bacteria from tissues, PCR, and immunohistochemistry analyses.
Infected male dogs may have abnormally sized testicles (swollen or shrunken). Other signs observed with canine brucellosis include infertility, anorexia, weight loss, pain, lameness, incoordination, swollen lymph nodes, and muscle weakness.
Brucellosis can remain dormant for years, so even long-term residents can be carriers without showing symptoms. To ensure health and safety, testing is recommended regardless of how long ago a pet was imported.
Some infected individuals may experience no symptoms, or only mild symptoms. Brucellosis can cause inflammation of the liver and/or spleen, joints (arthritis), respiratory system, and the testicles and scrotum.
In conclusion, asymptomatic brucellosis has a high likelihood of appearing symptomatic and its severity may be underestimated. Active screening of occupational and family populations should be enhanced, and special attention should be paid to high-titre students for early intervention, if necessary.
In a recent study performed in Mississippi, the prevalence of B. canis infection in shelter dogs was 2.3%, but the prevalence in shelters varies from 0 to 8.6%, which indicates that a small number of shelters may have a high seroprevalence of brucellosis (34). B.
Brucellosis antibodies can take up to three months to show up in an infected dog. Therefore false negative results (when the test is negative but the dog actually does have the disease) can occur if the test is carried out within 3-4 months of the contact with an infected individual.
The screening tests are very sensitive. A negative result means that the dog is truly not infected, but a positive may be a false positive and a confirmatory test should be done. There is no antibody screening test for people, so blood culture is used to diagnose brucellosis infection.
Unfortunately, there is no consistently effective treatment protocol for canine brucellosis. The only way to completely eliminate the risk of transmission of canine brucellosis is by euthanasia of the infected animals.
“Veterinarians and physicians don't know about the disease, so they don't know what to look for or how to diagnose it.” Brucellosis symptoms can mimic malaria, typhoid, or even food poisoning, leading many people to get misdiagnosed multiple times before finally receiving the correct treatment, if they ever do.
What is the treatment for canine brucellosis? Although antibiotics (most often minocycline or doxycycline, possibly enrofloxacin) can be used to help control the infection, no treatment is completely effective at eliminating the bacteria, as it can persist in tissues.
Symptoms of brucellosis may include fever, joint pain and being very tired. The infection can often be treated with antibiotics. However, treatment takes several weeks to months. And the infection can come back.
Testing for brucellosis in dogs
Because there are often no symptoms, testing is the most effective way of finding out if your dog is infected. Your vet will be able to recommend the best test for your dog. Most commonly, your dog will have blood tests.
Brucellosis is a zoonotic disease, or a disease that can be transmitted from animals to humans, but transmission is rare. Although people can become infected by coming in contact with infected animals, it is rare for a person to get a brucellosis infection from a dog.
Infected animals can only transmit rabies after the initial signs of illness begin. In nature, wildlife such as raccoons, skunks, foxes and bats serve as the major animals that have the virus and can spread it to other animals or people (known as reservoirs).
Canine brucellosis is an infectious disease that affects dogs and is caused by a bacteria called Brucella canis. It mainly affects the reproductive organs (womb and testicles) causing infertility and pregnancy loss, but it can also cause lameness, back pain, lethargy and swollen lymph nodes.
Brucellosis is a bacterial disease caused by various Brucella species, which mainly infect cattle, swine, goats, sheep and dogs.
Diagnosis of brucellosis is made by testing blood or the spongy matter inside the bones, called bone marrow. Other tests can help find complications of brucellosis. They include: X-rays.
Brucellosis typically begins with a flu-like illness. This may include fever, headache, weakness, drenching sweats, chills, weight loss, joint and muscle pain, and generalised aches. Inflammation of the liver and spleen, and gastrointestinal or respiratory symptoms may also occur.
Brucella organisms persist intracellularly, and their DNA has been detected in the peripheral blood of asymptomatic patients, even years after the diagnosis of clinical brucellosis and its clinically successful cure.
False Positives and False Negatives: The SNAP test can produce false positives, where the test indicates an infection when there isn't one, and false negatives, where the test fails to detect an existing infection. significantly depending on how the test is administered and the stage of the infection.
In this study, we confirmed that asymptomatic brucellosis infection occurs in some individuals.
Incubation Period
In dogs, bacteremia generally begins 1-4 weeks after infection. The period between infection and reproductive losses is variable. Abortions usually occur in the last trimester of gestation, and early embryonic deaths have occurred a few weeks after venereal transmission.
There is no treatment for brucellosis and there is no vaccine currently available for dogs. It is extremely important for owners to fully understand what these risks are and how they can help preserve the disease-free status of the UK to maintain the future welfare of our pets.