Lyme disease nursing: assessment, stages, and interventions

Lyme disease is the most common vector-borne illness in the United States, with the CDC estimating approximately 476,000 diagnoses annually. Caused by the spirochete Borrelia burgdorferi and transmitted through the bite of infected Ixodes ticks, it progresses through three well-defined clinical stages — from the hallmark bull’s-eye rash of early infection to potentially disabling arthritis and neurological deficits if untreated. For nursing students, Lyme disease tests multiple competencies at once: infectious disease pathophysiology, systematic assessment across stages, antibiotic pharmacology, patient education, and the ability to recognize subtle cardiac and neurological complications. This reference covers every stage, the two-tier diagnostic protocol, stage-based treatment, and tick removal and prevention — everything you need for clinical practice and the NCLEX.

Fast-scan summary: Lyme disease stages

Pathophysiology

Borrelia burgdorferi is a gram-negative spirochete with a distinctive spiral morphology and an outer surface covered in lipoproteins. In the United States, the primary vector is Ixodes scapularis (the black-legged tick, commonly called the deer tick) in the northeastern US and upper Midwest. On the Pacific Coast, Ixodes pacificus transmits disease. These ticks have a three-stage life cycle — larva, nymph, and adult — and the nymphal stage, which feeds in late spring and summer, accounts for most human infections because nymphs are tiny (poppy-seed sized) and often go unnoticed.

Transmission requires prolonged attachment. The tick must be attached for at least 36 to 48 hours before B. burgdorferi organisms migrate from the tick’s midgut to its salivary glands and are injected into the host. This transmission window is critical for prevention: prompt tick removal within 24 hours almost always prevents infection.

Once inoculated into the skin, B. burgdorferi evades initial immune clearance through complement resistance and antigenic variation. The organism disseminates through the bloodstream and lymphatics within days to weeks, seeding the heart, nervous system, and synovial tissue. Tissue inflammation is largely immune-mediated — the organism triggers IL-1β, IL-6, and TNF-α release, driving the arthritis, carditis, and neuritis seen in later stages. The spirochete is fastidious and slow-growing, which partly explains the indolent course of late-stage disease.

Geographic distribution in the US is concentrated in the Northeast (Maine through Maryland), upper Midwest (Wisconsin, Minnesota), and Pacific Northwest. Over 95% of confirmed cases occur in these endemic regions, making travel and residence history important assessment data.

Stage 1: Early localized Lyme disease

Assessment findings

Early localized Lyme disease develops 3 to 30 days after an infected tick bite. The hallmark finding is erythema migrans (EM) — a skin lesion that begins as a small red macule or papule at the bite site and expands outward over days. The classic appearance is a large oval or circular red rash with central clearing, producing the distinctive bull’s-eye pattern. In practice, the classic bull’s-eye appears in roughly 20% of cases; more commonly, the rash is uniformly red with a homogeneous appearance. The EM lesion typically reaches at least 5 cm in diameter (often 10–30 cm) and is warm but usually not painful or pruritic.

Erythema migrans is pathognomonic for Lyme disease in an endemic area — no additional laboratory testing is required to make the diagnosis when a classic EM lesion is present.

Systemic symptoms accompanying the rash include:

• Fatigue (often described as profound)
• Fever and chills
• Myalgia and arthralgia
• Headache
• Regional lymphadenopathy near the bite site

Stiff neck may occur but, at this stage, reflects meningismus rather than true meningitis.

Assessment priorities

When Stage 1 Lyme disease is suspected, assess and document:

• Location, size, and morphology of any rash (measure diameter in centimeters; photograph if possible)
• Date of potential tick exposure and geographic location
• Any tick still attached (size, estimated engorgement, location on body)
• Systemic symptoms and their onset timeline
• Vital signs including temperature

Stage 2: Early disseminated Lyme disease

Early disseminated disease develops days to several weeks after the initial infection as B. burgdorferi spreads hematogenously. This stage can involve three major body systems.

Skin

Multiple erythema migrans lesions appear at sites distant from the original bite, representing secondary cutaneous dissemination rather than new tick bites. These secondary lesions are typically smaller than the primary EM and may be multiple.

Cardiac involvement (Lyme carditis)

Cardiac involvement occurs in approximately 1–10% of untreated patients. B. burgdorferi infiltrates the cardiac conduction system, causing inflammation that preferentially affects the atrioventricular (AV) node. The result is AV block of varying degree:

Key nursing priorities for Lyme carditis:

• Continuous cardiac monitoring (telemetry) — AV block can fluctuate rapidly, progressing from first-degree to complete heart block within hours
• Monitor for symptoms: syncope, near-syncope, palpitations, chest pain, dyspnea
• Temporary pacemaker availability for high-degree AV block
• IV ceftriaxone is indicated for any degree of AV block with PR interval >300 ms, or for symptomatic patients

Review EKG interpretation and AV block recognition for a detailed breakdown of block patterns.

Neurological involvement (Lyme neuroborreliosis)

Neurological manifestations occur in roughly 10–15% of untreated patients and can include:

• Facial nerve palsy (Bell’s palsy) — the most common neurological manifestation; may be bilateral; caused by inflammation of the facial nerve as it passes through the petrous bone
• Lymphocytic meningitis — headache, photophobia, neck stiffness; CSF shows lymphocytic pleocytosis with normal or mildly elevated protein
• Radiculopathy — shooting pain, numbness, or weakness following a dermatomal distribution; caused by spirochetal inflammation of nerve roots
• Cranial neuritis — involving multiple cranial nerves, not just CN VII

Assess for facial asymmetry, inability to close the eye on the affected side, diminished taste, and hyperacusis (sensitivity to sound) — classic Bell’s palsy signs. For patients with neurological involvement, a lumbar puncture may be performed to evaluate CSF. See the meningitis nursing reference for LP procedure and CSF interpretation details.

Stage 3: Late disseminated Lyme disease

Late disseminated disease develops months to years after the initial infection, most often in patients who were not diagnosed or adequately treated earlier. The two major manifestations are Lyme arthritis and late neurological Lyme disease.

Lyme arthritis

Lyme arthritis is the most common late manifestation in the US, occurring in approximately 60% of untreated patients. It presents as intermittent or persistent arthritis affecting large joints, with the knee involved in over 80% of cases. One or two joints are typically affected — asymmetric oligoarthritis. The affected joint shows:

• Marked joint swelling (often disproportionate to pain)
• Warmth and erythema
• Effusion, often large
• Synovial thickening on examination

Lyme arthritis is an important differential diagnosis for any patient presenting with monoarthritis or oligoarthritis of the knee. Key differentiators from rheumatoid arthritis include the asymmetric pattern, large joint predominance, and lack of symmetric small joint involvement — for a full comparison of inflammatory arthritides, see the rheumatoid arthritis nursing reference.

Synovial fluid analysis typically shows elevated WBC (10,000–100,000 cells/mm³, predominately neutrophils), distinguishing it from non-inflammatory joint disease. B. burgdorferi PCR of synovial fluid is the most sensitive confirmatory test at this stage (see Diagnostics section).

Late neurological Lyme disease

Late neurological manifestations are less common than Lyme arthritis but more debilitating. They include:

• Lyme encephalopathy — subtle cognitive symptoms: memory impairment, difficulty concentrating, word-finding problems; often described as “brain fog”
• Peripheral neuropathy — distal paresthesias, burning pain, often in a stocking-glove distribution

These manifestations develop from ongoing spirochetal infection and associated immune-mediated neuroinflammation. Patients often report symptoms that predate presentation by months to years.

Diagnostics

Two-tier testing protocol

Laboratory diagnosis of Lyme disease follows the CDC-recommended two-tier testing algorithm:

When to skip serology: Erythema migrans in a patient from an endemic area is a clinical diagnosis. Serologic testing is not required — and can be falsely negative in early disease because antibodies may not have developed yet (seroconversion typically takes 2–6 weeks). Beginning treatment based on clinical diagnosis does not require laboratory confirmation.

False negatives in early disease: The sensitivity of two-tier testing is only 29–40% in Stage 1 (early localized). It rises to approximately 70–90% in disseminated disease and approaches 99% in late Lyme arthritis. This means a negative ELISA in the first two weeks of symptoms does not rule out Lyme disease in a patient with classic EM.

PCR of synovial fluid

For patients with Lyme arthritis, PCR for B. burgdorferi DNA in synovial fluid has high sensitivity (approximately 85%) and specificity. This is particularly useful when serologic results are equivocal or when the clinical picture is atypical. Direct culture of B. burgdorferi is technically possible but impractical in clinical settings — the organism is extremely slow-growing.

Supporting labs

Review nursing lab values when interpreting the following supporting studies:

Treatment overview

Treatment in Lyme disease is guided by stage, patient age, pregnancy status, and presence of cardiac or neurological involvement. All antibiotic regimens target B. burgdorferi directly — for antibiotic classification context, see the drug classifications reference.

Why doxycycline is avoided in certain populations: Doxycycline binds to calcium in developing bone and teeth, causing permanent discoloration and potential enamel hypoplasia. It is contraindicated in children under 8 years and is not recommended during pregnancy (teratogenic risk in second and third trimesters, photosensitivity, and potential hepatotoxicity). Amoxicillin is the preferred oral alternative for these groups.

Single-dose prophylaxis: A single 200 mg dose of doxycycline (4.4 mg/kg in children, max 200 mg) given within 72 hours of a tick bite may prevent Lyme disease if the tick was Ixodes scapularis, the bite occurred in an endemic area, and the tick was attached for at least 36 hours (estimated by engorgement). This is an optional but evidence-based strategy — it is not routinely recommended for all tick bites.

Nursing assessments and interventions

Tick removal

When a tick is found attached, proper removal technique prevents squeezing the tick and inadvertently inoculating more organisms:

1. Use fine-tipped tweezers (not flat-tipped, not fingers, not petroleum jelly or heat)
2. Grasp the tick as close to the skin surface as possible
3. Apply steady, upward traction — do not twist or jerk
4. After removal, clean the bite site with rubbing alcohol or soap and water
5. Document the tick — note size (pin-head = nymph, sesame-seed = adult), degree of engorgement, body location, and estimated attachment duration
6. Dispose of the tick by placing in alcohol, sealing in a bag, or flushing; do not crush with fingers

For wound care following tick removal, see the wound assessment reference.

Monitoring priorities by stage

Medication administration

Doxycycline (oral):

• Administer with a full glass of water (240 mL) — doxycycline can cause esophageal ulceration if it sits in the esophagus
• Do not take with dairy products, antacids, or iron supplements — divalent and trivalent cations chelate tetracyclines and reduce absorption by up to 80%
• Photosensitivity — instruct patients to use sunscreen, wear protective clothing, and avoid prolonged sun exposure; severe sunburn can occur with minimal UV exposure
• Take with food to reduce nausea, but note that high-fat meals may slightly reduce absorption

IV Ceftriaxone:

• Administer over 30 minutes; monitor for infusion reactions
• Monitor LFTs and renal function during prolonged courses
• Assess IV site for phlebitis; central access is preferred for 14+ day courses

Jarisch-Herxheimer reaction

The Jarisch-Herxheimer reaction (JHR) is a transient systemic reaction that occurs within 24 hours of starting antibiotic therapy for spirochetal infections. It is caused by the rapid release of bacterial lipoproteins and other inflammatory mediators from dying B. burgdorferi organisms, triggering a surge in cytokine production.

Clinical presentation: Fever (temperature often rising 1–2°C above baseline), rigors, headache, myalgia, diaphoresis, and general malaise — resembling a flu-like illness. It typically peaks at 4–8 hours and resolves within 24 hours.

Key nursing intervention: Reassure the patient that this is an expected response to antibiotic therapy, not an allergic reaction. Antipyretics (acetaminophen or ibuprofen) help manage fever and discomfort. Do not stop antibiotics — the JHR does not indicate treatment failure or drug intolerance. Distinguishing JHR from a true drug allergy (urticaria, angioedema, anaphylaxis) is essential; JHR lacks urticaria and responds to time plus antipyretics.

Patient education

Prevention

Prevention is the most effective intervention in Lyme disease. Teach patients in endemic areas:

• DEET-based repellents (≥20% DEET) on exposed skin; reapply per label instructions
• Permethrin-treated clothing — permethrin binds to fabric and kills ticks on contact; effective for multiple wash cycles; do not apply directly to skin
• Tick checks within 2 hours of returning indoors from wooded or grassy areas — pay attention to hairline, behind ears, axillae, groin, and between toes
• Full-body shower after outdoor exposure to remove unattached ticks
• Yard management — keep grass short, create wood-chip barriers between lawn and wooded areas, remove leaf litter

Medication adherence

Patients commonly feel significantly better within 2–3 days of starting antibiotics. Emphasize that the full course must be completed even when symptoms resolve — inadequate treatment increases the risk of persistent or late-stage disease. For doxycycline, remind patients of the food-drug and sun interactions.

Follow-up

Patients should understand that some symptoms — particularly fatigue and musculoskeletal complaints — may persist for weeks after completing antibiotics. This is sometimes called “Post-Treatment Lyme Disease Syndrome” (PTLDS). It does not indicate ongoing active infection, and there is no evidence that extending antibiotic treatment beyond the standard course improves outcomes. Educate patients to return for follow-up if symptoms worsen, new symptoms develop, or the EM rash fails to resolve within 2–3 weeks of starting treatment.

NCLEX questions

Question 1

A nurse is caring for a patient who presents with a 7 cm circular rash with central clearing on the right forearm after a hiking trip in Connecticut. The patient reports fever, fatigue, and myalgia for the past 4 days. Which action should the nurse anticipate first?

A) Draw blood for ELISA and Western blot before starting treatment B) Begin empiric doxycycline therapy based on clinical diagnosis C) Obtain a skin biopsy of the rash for culture D) Schedule a lumbar puncture to rule out meningitis

Answer: B

Rationale: The bull’s-eye erythema migrans rash in a patient who has been in a Lyme-endemic area (Connecticut, northeastern US) is pathognomonic for early localized Lyme disease. Clinical diagnosis is sufficient — serologic testing is not required and is often falsely negative in the first 2–6 weeks of infection because antibodies have not yet developed. Empiric doxycycline should be initiated promptly. There is no indication for lumbar puncture without neurological symptoms, and skin biopsy for culture is not a standard clinical practice.

Question 2

A patient with Lyme disease is admitted for cardiac monitoring. The ECG shows a PR interval of 320 ms that has been fluctuating between 180 ms and 340 ms over the past 6 hours. Which nursing action is the highest priority?

A) Administer oral doxycycline and reassess in 24 hours B) Maintain continuous telemetry monitoring and have temporary pacemaker equipment available C) Discontinue cardiac monitoring once the patient is asymptomatic D) Prepare the patient for immediate permanent pacemaker insertion

Answer: B

Rationale: AV block in Lyme carditis can fluctuate rapidly — a patient with first-degree block can progress to complete heart block within hours. A PR interval of 320 ms meets the threshold for IV ceftriaxone rather than oral antibiotics, and continuous telemetry is mandatory. Temporary pacemaker equipment should be readily available for any patient with high-degree AV block. Permanent pacemaker insertion is not indicated — Lyme carditis is reversible with appropriate antibiotic therapy. Discontinuing monitoring in a patient with fluctuating PR intervals would be unsafe.

Question 3

A nurse has just administered the first dose of doxycycline to a patient with early Lyme disease. Eight hours later the patient reports fever (38.6°C), chills, and generalized body aching. The patient states, “I must be allergic to this medication.” What is the most appropriate nursing response?

A) Withhold further doses of doxycycline and notify the provider of an allergic reaction B) Administer diphenhydramine for the suspected allergic reaction C) Reassure the patient that this is an expected response, administer acetaminophen, and continue the antibiotic D) Switch to IV ceftriaxone due to intolerance of oral doxycycline

Answer: C

Rationale: The Jarisch-Herxheimer reaction (JHR) occurs within 24 hours of initiating antibiotic therapy for spirochetal infections. It presents as fever, rigors, myalgia, and malaise caused by the release of bacterial antigens from dying organisms — not a drug allergy. JHR lacks the skin findings of true allergy (urticaria, angioedema) and resolves within 24 hours. Antibiotics should not be stopped; acetaminophen provides symptomatic relief. Reassurance is the key nursing intervention — patients who believe they are having an allergic reaction may refuse further antibiotic doses.

Question 4

A 10-year-old child is diagnosed with early Lyme disease after presenting with an erythema migrans rash. Which antibiotic is most appropriate for this patient?

A) Doxycycline 100 mg PO BID for 10 days B) Amoxicillin 50 mg/kg/day PO divided TID for 14 days C) Ceftriaxone 2 g IV once daily for 14 days D) Azithromycin 500 mg PO once daily for 7 days

Answer: B

Rationale: Doxycycline is contraindicated in children under 8 years because it binds to calcium in developing teeth and bones, causing permanent discoloration and enamel hypoplasia. Amoxicillin at 50 mg/kg/day (maximum 1,500 mg/day) divided three times daily for 14 days is the recommended first-line treatment for early Lyme disease in children under 8 and in pregnant patients. IV ceftriaxone is reserved for disseminated disease with cardiac or neurological involvement — not indicated for uncomplicated early localized Lyme disease. Azithromycin is considered a second-line alternative and has lower efficacy than doxycycline or amoxicillin.

Question 5

A nurse is reviewing the chart of a patient with swollen, warm, painful right knee. The provider suspects Lyme arthritis and orders synovial fluid aspiration. Which diagnostic finding would most support a diagnosis of Lyme arthritis?

A) Synovial fluid WBC of 500 cells/mm³ with predominantly lymphocytes B) Synovial fluid WBC of 45,000 cells/mm³ with positive B. burgdorferi PCR C) Negative Western blot with positive ELISA D) Normal ESR and CRP with positive uric acid crystals on polarized microscopy

Answer: B

Rationale: Lyme arthritis produces an inflammatory synovial fluid with WBC typically 10,000–100,000 cells/mm³ (neutrophil-predominant), and B. burgdorferi PCR of synovial fluid is the most sensitive confirmatory test in late Lyme disease (approximately 85% sensitivity). A WBC of 500 cells/mm³ with lymphocytes suggests non-inflammatory arthritis. A negative Western blot after positive ELISA is more consistent with a false-positive ELISA (Lyme unlikely), not confirmed Lyme disease. Uric acid crystals indicate gout, not Lyme arthritis.

Question 6

A patient being treated for disseminated Lyme disease asks the nurse about preventing tick bites in the future. Which preventive measures should the nurse include? Select all that apply.

A) Apply DEET-based repellent (at least 20%) to exposed skin before outdoor activity B) Wear permethrin-treated clothing when in wooded or grassy areas C) Check the body for ticks within 2 hours of returning indoors D) Remove any attached tick immediately by crushing it between the fingers E) Take a shower after outdoor exposure to remove unattached ticks

Answer: A, B, C, E

Rationale: DEET repellent, permethrin-treated clothing, prompt tick checks, and showering after outdoor exposure are all evidence-based prevention strategies recommended by the CDC. Option D is incorrect — ticks should be removed with fine-tipped tweezers using a steady upward pull, never crushed between the fingers. Crushing an attached tick can rupture its body and force infective contents into the bite wound, increasing transmission risk.

Related articles

• Wound assessment and wound care principles — tick removal and bite site management
• Rheumatoid arthritis nursing reference — differentiating Lyme arthritis from autoimmune inflammatory arthritis
• Meningitis nursing reference — Lyme meningitis in the context of meningeal disease
• EKG interpretation cheat sheet — AV block recognition and monitoring
• Nursing lab values cheat sheet — CBC, ESR, CRP interpretation in infectious disease
• Drug classifications reference — tetracycline and beta-lactam antibiotic classes