Lyme Disease in Dogs: Symptoms, Treatment & Prevention Guide

What is Lyme Disease?

Lyme disease is a tick-borne illness caused by the bacterium Borrelia burgdorferi. It is transmitted to dogs through the bite of infected black-legged ticks (deer ticks). Lyme disease is one of the most common tick-transmitted diseases in the world, with high prevalence in the Northeastern, Mid-Atlantic, and Upper Midwest United States.

How Dogs Get Lyme Disease

• Black-legged tick (deer tick) must be attached for 24-48 hours
• Tick must be infected with Borrelia burgdorferi
• Not all tick bites transmit disease
• Endemic areas: Northeast, Mid-Atlantic, Upper Midwest, Pacific Coast

<CTA1 />

Symptoms

Early Signs (2-5 months after tick bite)

• Fever (103-105°F)
• Lethargy
• Loss of appetite
• Swollen lymph nodes

Joint Symptoms (Most Common)

• Shifting leg lameness (limping moves from one leg to another)
• Joint swelling and warmth
• Stiffness (especially after rest)
• Reluctance to move

Severe Complications

• Lyme nephritis (kidney disease - most common in Labrador and Golden Retrievers)
• Protein-losing nephropathy (protein in urine)
• Kidney failure
• Heart problems (rare)
• Neurological signs (rare)

Asymptomatic Infection

• 90-95% of infected dogs show NO symptoms
• Positive test does not mean active disease
• Decision to treat depends on symptoms, not just test results

Who Is at Risk?

• Dogs in endemic areas (Northeast, Upper Midwest, Pacific Coast)
• Hunting and hiking dogs (high tick exposure)
• Dogs not on tick prevention
• Labrador and Golden Retrievers (higher risk of kidney complications)
• Young dogs (more likely to develop symptoms)

Diagnosis & Costs

Diagnostic Tests

• 4Dx SNAP test (annual screening): $40-80 (tests for Lyme, Ehrlichia, Anaplasma, Heartworm)
• Quant C6 test (confirms active infection): $100-200
• CBC and chemistry: $150-300
• Urinalysis (check for protein loss): $60-120
• Joint fluid analysis (if lameness): $100-200

Total Diagnostic Cost: $100-600

<CTA2 />

Treatment

Standard Protocol

• Doxycycline (antibiotic): 4-week course, $30-80
• Amoxicillin (alternative): 4-week course, $25-60
• Anti-inflammatory (for joint pain): $20-50

Supportive Care

• Rest during treatment (2-4 weeks)
• Joint supplements (omega-3, glucosamine): $20-40/month
• Pain medication (NSAIDs): $25-50

Kidney Disease Treatment (Lyme Nephritis)

• Hospitalization: $500-1,500/day
• IV fluids: $100-200/day
• Medications (ACE inhibitors, special diet): $50-100/month
• Long-term management: $100-300/month

Total Treatment Cost

• Mild case: $50-$200
• Moderate case: $200-$500
• With kidney disease: $2,000-$8,000+

Prevention

Tick Prevention (Monthly)

• Oral: NexGard, Bravecto, Simparica ($15-30/month)
• Topical: Frontline, Advantix ($15-25/month)
• Collars: Seresto ($50-70 for 8 months)

Vaccination

• Lyme vaccine for dogs: $25-45 per dose
• Initial series: Two doses, 3-4 weeks apart
• Annual booster for at-risk dogs
• Recommended for: Dogs in endemic areas, hunting dogs, dogs with high tick exposure

Tick Management

• Check for ticks daily during tick season
• Remove ticks promptly (within 24 hours prevents transmission)
• Keep grass trimmed and remove leaf litter
• Avoid tick-infested areas during peak season

<CTA3 />

Prognosis

With Treatment

• Joint symptoms: Usually resolve within 3-5 days of starting antibiotics
• Full recovery: 4 weeks of antibiotics typically clears infection
• Reinfection possible: Antibodies do not provide long-term immunity
• Kidney disease: Prognosis guarded, lifelong management needed

Long-Term Effects

• Most dogs recover fully from joint symptoms
• Kidney damage may be permanent
• Chronic arthritis possible in untreated cases

---

Related: heartworm-disease, fleas-ticks, leptospirosis