Dog Ehrlichiosis Diagnosis and Tick-Borne Disease Management

Ehrlichiosis is a serious tick-borne disease in dogs requiring rapid diagnosis and treatment to prevent chronic infection and immune damage.

Key Facts

Ehrlichia canis is transmitted by the brown dog tick (Rhipicephalus sanguineus), prevalent in warm climates worldwide
Three phases exist: acute (1-4 weeks), subclinical (months to years), and chronic (severe immunological damage)
Acute signs include fever, lethargy, lymph node enlargement, and thrombocytopenia (low platelets)
Chronic ehrlichiosis can cause profound bone marrow suppression with life-threatening anemia
Doxycycline for a minimum of 28 days is the standard treatment; response is excellent if caught in the acute phase
PCR testing is more sensitive than antibody testing in the early acute phase
Dogs living in tick-endemic areas are at substantial risk without year-round tick prevention

Welfare Considerations

Untreated ehrlichiosis progresses silently through subclinical phases before causing severe irreversible bone marrow damage. Dogs in the chronic phase may require months of intensive treatment with uncertain outcomes. Early detection during the acute phase, when treatment is highly effective, requires owner awareness and prompt veterinary attention for tick-exposed dogs.

What You Can Do

Use year-round tick prevention in tick-endemic areas as recommended by your vet
Monitor tick-exposed dogs for fever, lethargy, or bruising and seek prompt veterinary care
Request tick-borne disease panel testing for any dog in an endemic area with unexplained illness
Complete the full 28-day doxycycline course - shorter courses risk subclinical persistence
Annual screening blood and platelet tests help detect ehrlichia in subclinical phase