Canine Anaplasmosis: Tick-Borne Fever Affecting Dog Wellbeing

Anaplasmosis in dogs is caused by tick-transmitted bacteria that infect white blood cells, causing fever, lethargy, and joint pain that responds well to doxycycline treatment when caught early.

Key Facts

Anaplasma phagocytophilum infects neutrophils while A. platys infects platelets in dogs
The deer tick (Ixodes scapularis) and western black-legged tick are primary vectors
Clinical signs appear 1-2 weeks after tick bite and include high fever, lethargy, and anorexia
Joint pain and stiffness are hallmarks - infected dogs may be reluctant to move
Thrombocytopenia occurs in most cases; severe bleeding is rare but possible
Morulae (bacterial clusters) may be visible inside white blood cells on blood smear
Doxycycline for 2-4 weeks is curative in most cases; improvement often seen within 24-48 hours
Coinfection with Lyme disease occurs frequently as both are Ixodes-transmitted
Year-round tick prevention is the most effective welfare protection for dogs in endemic areas

Welfare Considerations

Dogs with anaplasmosis experience significant suffering from high fever and joint pain that may be dismissed as general malaise. The rapid response to doxycycline makes early diagnosis crucial - dogs can go from severely ill to near-normal within days of starting treatment. Preventing tick infestation through consistent preventive medications eliminates this suffering entirely, making tick prevention one of the highest-value welfare investments for dogs in endemic regions.

What You Can Do

Use veterinarian-recommended year-round tick preventives in areas where anaplasmosis is endemic
Check dogs thoroughly for ticks after outdoor activities and remove them promptly
Recognize anaplasmosis signs: sudden fever, lethargy, joint stiffness - seek veterinary care within 24 hours
Request tick panel testing when dogs show signs of tick-borne illness in endemic areas
Complete the full doxycycline course even when dogs improve quickly
Support tick-borne disease surveillance programs that track geographic expansion of these diseases