Inf: Lyme Disease: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Lyme Disease🎧 A clear, high-yield breakdown of this tick-borne bacterial infection with multisystem effects – perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• Lyme disease is a bacterial infection caused by Borrelia burgdorferi, transmitted via the bite of infected Ixodes ticks, affecting skin, joints, heart, and nervous system.📌 Causes & Risk Factors• Tick bite from Ixodes species (black-legged/deer tick)• Outdoor activity in grassy/wooded areas (e.g., hiking, camping, gardening)• Peak risk: Spring & summer, UK hotspots include New Forest, Exmoor, South Downs• Not using tick repellent or protective clothingMnemonic: “Ticks In The Grass = Lyme Risk”📌 Pathophysiology• Borrelia enters at the bite site and spreads via the bloodstream• Evades immune system, leading to multisystem involvement• Different Borrelia species may cause different symptoms (arthritis in US, neuro Lyme in Europe)📌 Symptoms• Early (within 30 days): – Erythema migrans (bull’s-eye rash – classic but not always present) – Fever, headache, malaise, arthralgia• Disseminated/late: – Joint pain/swelling (esp. knee), facial palsy (Bell’s), radiculitis, heart block – Rare skin: acrodermatitis chronic atrophicansMnemonic: “EARLY: EM Rash, Ache, Run-down; LATE: Joints & Nerves”📌 Differential Diagnosis• Cellulitis, ringworm, urticaria, erythema nodosum• Viral: Parvovirus B19, West Nile• Rheumatological: Rheumatoid arthritis, fibromyalgia• Other tick-borne: Anaplasmosis, babesiosis• Syphilis, leptospirosis, chronic fatigue syndrome📌 Diagnosis• Erythema migrans rash = clinical diagnosis (no test needed)• Otherwise: – First-line: ELISA for Borrelia antibodies – If positive/equivocal: confirm with immunoblot (Western blot)• PCR for joint fluid (Lyme arthritis)• Do not test in low-risk/vague symptoms (risk of false positives)Tip: Rash + tick area = Treat! Don’t wait for tests.📌 Management• Antibiotics: – Doxycycline (first-line), amoxicillin, cefuroxime – Longer/IV courses for neuro/cardiac Lyme (refer to specialist)• Remove ticks promptly with tweezers• No routine antibiotics after tick bite (UK guidance)• Hospital referral: neuro/cardiac involvement• Patient education & prevention📌 Complications• Untreated: – Lyme arthritis (chronic), facial palsy, neuropathy, memory problems – Heart block, myocarditis – Chronic/post-Lyme syndrome: fatigue, pain, cognitive issues📌 Prognosis• Early, appropriate treatment = excellent prognosis, most recover fully• Some may experience prolonged symptoms (PTLDS), but serious complications are rare if managed early📎 More MSRA Resources for Lyme Disease📝 Revision Notes: https://www.passthemsra.com/topic/lyme-disease-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/lyme-disease-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/lyme-disease-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/lyme-disease-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/infectious-diseases-for-the-msra/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQandANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #LymeDisease