Published on Jan 4, 2026
Anaplasmosis
Anaplasmosis in Dogs
Anaplasmosis is a bacterial infection transmitted through the bite of an infected tick (primarily the Castor Bean Tick or Deer Tick). While often grouped with "Mediterranean diseases," it is prevalent across Europe, North America, and many other regions worldwide.
1. How is it Transmitted?
The disease is caused by the bacterium Anaplasma phagocytophilum, which attacks the dog's white blood cells. Transmission occurs during the tick's feeding process, typically requiring the tick to be attached for 24 to 48 hours. It is important to note that Anaplasmosis is not contagious from dog to dog or dog to human.
2. Common Symptoms
Many dogs may remain asymptomatic (showing no signs of illness). However, if the disease becomes active—usually 1 to 2 weeks after the tick bite—the following symptoms may occur:
General Health: High fever, lethargy, and loss of appetite.
Joints & Movement: Joint swelling, stiffness, or lameness (often resembling Lyme disease).
Blood Issues: Due to a decrease in blood platelets (thrombocytopenia), symptoms may include nosebleeds, bruising, or pinpoint hemorrhages on the gums.
Organs: Swollen lymph nodes and, in some cases, an enlarged spleen or liver.
3. Diagnosis and Treatment
Diagnosis: Anaplasmosis is diagnosed through blood tests, such as an antibody test (ELISA/Snap Test) or a PCR test to detect the pathogen's DNA.
Treatment: The prognosis is generally very good. The standard treatment involves a course of specific antibiotics (usually Doxycycline) for 3 to 4 weeks. Most dogs show significant improvement within the first few days of treatment.
4. Prevention: The Best Protection
Since there is no vaccine currently available for Anaplasmosis, preventing tick bites is the most effective strategy:
Tick Prophylaxis: Use veterinarian-approved spot-ons, collars, or oral tablets to repel or kill ticks.
Daily Checks: Thoroughly check your dog's coat for ticks after every walk.
Prompt Removal: Removing ticks immediately reduces the risk of transmission significantly.
Note: A positive antibody test does not always mean a dog is currently sick; it may simply indicate previous exposure. Treatment is typically only required if the dog shows clinical symptoms or abnormal blood values.
