Inf: Giardiasis: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Giardiasis🎧 A clear, high-yield breakdown of this common parasitic cause of chronic diarrhoea – perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• Giardiasis is a parasitic gastrointestinal infection caused by Giardia lamblia, a flagellated protozoan.• It leads to diarrhoea, malabsorption, and chronic GI symptoms.📌 Causes & Risk Factors• Faecal-oral transmission via contaminated food or water• Travel to endemic regions (e.g. South Asia, Africa, Latin America)• Untreated water sources (rivers, lakes, wells)• Oral-anal sexual contact• Crowded conditions: day-care centres, care homes• Immunosuppression💡 Mnemonic: “WATER” – Wells, Anal contact, Travel, Endemic, Rivers📌 Pathophysiology• Ingested cysts transform into trophozoites in the small intestine• Trophozoites adhere to intestinal villi without deep invasion• Disrupts nutrient absorption → malabsorption (especially fats)• Re-encysted forms are passed in faeces → infectious to others📌 Symptoms• Foul-smelling, fatty diarrhoea (steatorrhoea)• Bloating, flatulence, abdominal cramps• Weight loss, fatigue, nausea• Chronic symptoms may resemble IBS💡 Mnemonic: “F-BAG” – Fatty stools, Bloating, Abdominal pain, Gas📌 Differential Diagnosis• Infectious: Cryptosporidiosis, bacterial/viral gastroenteritis• Non-infectious: Coeliac disease, IBD, IBS• Consider giardiasis in prolonged travel-related diarrhoea📌 Diagnosis• Stool microscopy: Detects cysts/trophozoites (∼65% sensitivity)• Antigen detection (EIA): Preferred for better accuracy• PCR: High sensitivity for detecting Giardia DNA• 💡 Key tip: Send 3 stool samples 2–3 days apart📌 Management• First-line: Metronidazole (BNF)• Preferred (single dose): Tinidazole• Supportive care: Oral rehydration, fluid balance• Alternatives: Mepacrine (unlicensed), Albendazole, Mebendazole• Reinforce hygiene advice to prevent reinfection/spread⚠️ Rising metronidazole resistance: up to 20% failure rate📌 Complications• Chronic diarrhoea, malabsorption, weight loss• Failure to thrive in children• Post-infectious IBS, secondary lactose intolerance• Rare: Cholecystitis, reactive arthritis, pancreatitis📌 Prognosis• Excellent with prompt antimicrobial treatment• Most recover in weeks, but post-infectious symptoms may linger📎 More MSRA Resources for Giardiasis📝 Revision Notes: https://www.passthemsra.com/topic/giardiasis-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/giardiasis-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/giardiasis-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/giardiasis-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/infectious-diseases-for-the-msra/Hashtags#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQ&ANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #InfectiousDiseases #Giardiasis