Which are the symptoms of Ehrlichiosis / Canine Rickettsiosis?

Symptoms of Ehrlichiosis / Canine Rickettsiosis

Ehrlichiosis, also known as Canine Rickettsiosis, is a tick-borne disease that affects dogs. It is caused by various species of the Ehrlichia bacteria, which are transmitted through the bite of infected ticks. The symptoms of Ehrlichiosis can vary depending on the stage of the disease and the dog's immune response. Here are some common symptoms to look out for:

Acute Phase:

The acute phase of Ehrlichiosis typically occurs 1-3 weeks after a tick bite. During this phase, dogs may exhibit the following symptoms:

• Fever: Dogs may develop a high fever, often above 103°F (39.4°C).


• Lethargy: Dogs may appear weak, tired, and lack energy.


• Loss of appetite: Dogs may experience a reduced or complete loss of appetite.


• Enlarged lymph nodes: Swollen lymph nodes may be palpable under the skin.


• Weight loss: Dogs may experience unexplained weight loss.


• Discharge from the eyes and nose: Dogs may have a watery or pus-like discharge.


• Nosebleeds: Some dogs may experience spontaneous nosebleeds.


• Joint pain: Dogs may show signs of stiffness, lameness, or reluctance to move.


• Respiratory symptoms: Coughing, difficulty breathing, and rapid breathing may be observed.


• Bleeding disorders: In severe cases, dogs may develop bleeding disorders, leading to bruising or blood in the urine or stool.

Subclinical Phase:

After the acute phase, some dogs may enter a subclinical phase where they show no apparent symptoms. However, the bacteria continue to multiply and can cause long-term damage to various organs, including the spleen, liver, and bone marrow.

Chronic Phase:

If left untreated, Ehrlichiosis can progress to the chronic phase, which may occur months or even years after the initial infection. The chronic phase is characterized by more severe symptoms, including:

• Depression: Dogs may appear depressed and have a decreased interest in activities.


• Anemia: Dogs may develop anemia, resulting in pale gums, weakness, and fatigue.


• Swollen limbs: Some dogs may experience limb swelling due to fluid accumulation.


• Neurological signs: In rare cases, dogs may exhibit neurological symptoms such as seizures, ataxia, or paralysis.


• Eye problems: Ocular abnormalities, including uveitis and retinal hemorrhage, may occur.


• Organ dysfunction: Chronic Ehrlichiosis can lead to dysfunction of various organs, causing symptoms related to the affected organ.

If you suspect your dog may have Ehrlichiosis, it is crucial to consult a veterinarian for proper diagnosis and treatment. Early detection and appropriate management can improve the prognosis and prevent complications associated with this tick-borne disease.