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Lyme Disease in Dogs: Symptoms, Tests, Treatment, and Prevention


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Lyme disease, also known as Lyme borreliosis, is a bacterial illness that can be transmitted to humans, dogs, and other animals by certain species of ticks. It is caused by the spiral-shaped bacterium Borrelia burgdorferi that is carried inside a tick and gets into a dog or person’s bloodstream through a tick bite. Once in the bloodstream, the bacteria can travel to different parts of the body and cause problems in specific organs or locations, such as joints, as well as overall illness.

Where Do Ticks Live?

Two Brittany dogs sitting together in field surrounded by tall yellow wildflowersThe ticks that carry Lyme disease are especially likely to be found in tall grasses, thick brush, marshes, and woods — waiting to latch onto your dog when he passes by. A tick can transmit the disease once it has been attached to a dog for 24 to 48 hours.

First named when a number of cases occurred in Lyme, Connecticut, in 1975, the disease can be hard to detect and can cause serious, ongoing health problems in both dogs and people.

Lyme disease happens in every state, but infection risks vary. Over 95% of cases are from the Northeast, the Upper Midwest, and the Pacific coast, although with recent changes in deforestation, migrating deer and bird populations, percentage rates in these areas are constantly changing.

A small number of cases crop up each year along the West Coast, especially Northern California. In Canada, Lyme-positive dogs are found mostly in southern Ontario and southern Manitoba. A smaller number of cases are reported each year in Southern Quebec and the Maritime Provinces.

How do Ticks Get on People and Dogs?

Black-legged-tick-block2.jpg
The primary carrier of Lyme disease is the blacklegged tick (Ixodes scapularis), also called the “deer tick” or “bear tick.” The tick acquires the Lyme disease bacterium when it feeds on an animal that has been infected, such as a mouse, deer, or other mammal, and then transmits the bacterium to the next animal it feeds on. Image: CDC

Ticks don’t jump or fly; they can only crawl. They get onto their host by waiting at the tips of vegetation. When a dog or person brushes against a bush, for example, the tick quickly grabs on and then crawls to find a place to bite.

What are the symptoms of Lyme Disease in Dogs?

Lyme disease is, unfortunately, a fairly common canine disease. Typical symptoms in dogs include:

  • Fever
  • Loss of appetite
  • Reduced energy
  • Lameness (can be shifting, intermittent, and recurring)
  • Generalized stiffness, discomfort, or pain
  • Swelling of joints

Symptoms can progress to kidney failure, which can be fatal. Serious cardiac and neurological effects can also occur.

How are Dogs Tested for Lyme Disease?

Diagnosis is made by a combination of history, physical signs, and diagnostics. For dogs, the two blood tests for diagnosing Lyme disease are called the C6 Test and Quant C6 test. Veterinarians perform both.

The C6 test detects antibodies against a protein called “C6”.  Presence of the antibodies suggests an active Lyme infection. The C6 antibodies can be detected three to five weeks after an infected tick bites a dog and may be found in the bloodstream even before the dog shows signs of illness.

The next step is to do a Quant C6 test. This, along with urinalysis will help determine if antibiotic treatment is necessary.

How is Lyme Disease Treated?

dog at vetTreatment includes antibiotics, usually for at least 30 days. This often resolves symptoms quickly, but in some cases, the infection will persist and prolonged medication may be needed. Treatment can also include other therapies aimed at resolving or relieving specific symptoms.

Can I Catch Lyme Disease From my Dog?

Dogs are not a direct source of infection for people. Lyme disease can’t be transmitted from one pet to another, nor from pets to humans, except through tick bites. However, a carrier tick could come into your house on your dog’s fur and get on you.

If your dog is diagnosed with Lyme disease, you and any other pets have probably been in the same outdoor environment and may also be at risk, so it is a good idea to consult with your physician and veterinarian to see whether you should test other pets or family members.

Other Canine Diseases Carried by Ticks

Ticks can also carry several other less common but serious bacterial diseases affecting dogs, including anaplasmosis and babesiosis.

Anaplasmosis can involve symptoms similar to those for Lyme disease. Babesiosis can present with a wide range of symptoms, from sudden and severe shock, high fever, and dark urine to a slowly progressing infection with more subtle clinical signs. Diagnosis of both diseases includes blood tests similar to those used to check for Lyme disease.

Sometimes, dogs and people can become sick with “co-infection” of multiple tick-borne diseases, where more than one type of disease-causing bacteria is transmitted through a tick bite. This situation can make diagnosis and treatment even more challenging and difficult.

How Can I Prevent My Dog From Getting Lyme Disease or Other Tick-borne Illnesses?

Anatolian Shepherd Dog standing in a rocky, wooded landscape

Recommendations on preventing ticks include these from AKC’s Chief Veterinary Officer Dr. Jerry Klein:

  • Inspect your dogs and yourself daily for ticks after walks through the woods or grassy settings. On dogs, look especially on the feet (and between toes), on lips, around eyes, ears (and inside ears), near the anus, and under the tail.
  • Remove ticks stat. The quicker you find them the less likely your dog will contract a secondary illness related to tick bites. Learn the proper method of tick removal. Invest in a pair of fine tweezers used for this purpose. If you are unable to do so, consult with a veterinarian.
  • Ask your veterinarian to conduct a tick check at each exam. They’ll be able to find any you may have missed.
  • Prevent ticks from jumping on your dog with one of the many veterinary-approved flea and tick preparations available on the market. Speak to your veterinarian to find the best and most appropriate product for your dog.
  • Keep grass mowed as short as possible. Refrain from walking into grassy patches in endemic tick areas if you can.
  • Get your dog vaccinated. Vaccination could prevent your dog from getting Lyme disease. They may not be appropriate for some dogs, so discuss with your vet.

The post Lyme Disease in Dogs: Symptoms, Tests, Treatment, and Prevention appeared first on American Kennel Club.


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