Inf: Gastroenteritis: Free MSRA Podcast

💧 FREE MSRA PODCAST – Gastroenteritis: Fast-Track Guide to Diagnosis, Bugs & ManagementStruggling to memorise the endless causes and complications of gastroenteritis for your exams? This episode distils it all into clear, exam-ready points—symptoms, triggers, investigations, bugs, red flags, and classic mnemonics.🧠 Key Learning Points📌 Definition:Gastroenteritis = inflammation of the stomach and intestines, usually due to infection, causing diarrhoea, vomiting, abdominal pain, and sometimes fever.📌 Causes & Risk Factors:• Infectious: – Viruses: Norovirus (main UK adult cause, winter vomiting), Rotavirus (kids), Adenovirus – Bacteria: Campylobacter, Salmonella, E. coli, Shigella, Staph aureus, Bacillus cereus – Parasites: Giardia, Cryptosporidium• Non-infectious: Toxins (preformed), medication side effects• Risk factors: Poor hygiene, contaminated food/water, crowded living, young/old, immunosuppression📌 Pathophysiology:• Bugs/toxins irritate and inflame GI mucosa → increased secretion & reduced absorption• Result = diarrhoea & vomiting, fluid loss, risk of dehydration📌 Classic Symptoms:• Sudden onset watery or (sometimes) bloody diarrhoea• Vomiting, nausea, cramping abdominal pain, fever• Dehydration: thirst, tachycardia, hypotension, confusion📌 High-Yield Differentials:• IBS, IBD, viral hepatitis, UTI, constipation (overflow), appendicitis, hyperemesis gravidarum, Addison’s disease• Red flag: Always rule out invasive bacterial infection if fever in adults📌 Epidemiology:• 17 million cases/yr in UK• Most common in children, elderly, immunocompromised• Norovirus = leading viral cause in adults (“winter vomiting bug”)• Campylobacter, Salmonella = frequent zoonotic/bacterial culprits• Outbreaks: schools, care homes, cruise ships📌 Diagnosis & Investigations:• Usually clinical—stool sample if: – Bloody stool, persistent diarrhoea, severe illness, immunosuppressed – Recent antibiotics/hospital stay, travel, food poisoning• Bloods: only if unwell• Imaging: rare, only if severe or complication• Notifiable diseases: Dysentery, food poisoning📌 Management:• Supportive: Fluids, oral rehydration, gradual reintroduction of food• Antiemetics/antidiarrhoeals• Antibiotics: Only if severe/confirmed bacterial, immunosuppressed, or specific bug (e.g. Campylobacter, C. diff)• Education: Hand hygiene, avoid sharing towels, exclude from school/work 48h• Hospitalisation: If unable to tolerate oral fluids, severe dehydration, risk factors/complications📌 Prognosis:• Most recover fully in days• Risk of dehydration/complications in young, elderly, immunosuppressed📌 Complications:• Dehydration & electrolyte imbalance (biggest risk)• HUS (E. coli O157), toxic megacolon, malnutrition• Guillain-Barré syndrome (post-Campylobacter), systemic spread (Salmonella)• Reactive arthritis, IBS, lactose intolerance post-infection• Hospitalisation, shock, rarely death in severe cases📌 Bugs, Timing, & Clues:• Norovirus: Fast onset, winter, vomiting dominates• Staph aureus/B. cereus: Rapid (1–6 hrs), vomiting > diarrhoea• Salmonella/E. coli: 12–48 hrs, watery diarrhoea• Shigella/Campylobacter: 48–72 hrs, bloody diarrhoea, cramps, GBS risk• Giardia/Amoeba: ≥7 days, prolonged non-bloody diarrhoea• Cholera: Profuse “rice-water” stool, rapid dehydration📎 More Gastroenteritis MSRA Resources:📝 Revision Notes: https://www.passthemsra.com/topic/gastroenteritis-revision-notes-2/🧠 Flashcards: https://www.passthemsra.com/topic/gastroenteritis-flashcards-2/💬 Accordion Q&A: https://www.passthemsra.com/topic/gastroenteritis-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/gastroenteritis-rapid-quiz/🎓 Infectious Diseases for the MSRA: https://www.passthemsra.com/courses/infectious-diseases-for-the-msra/#MSRA #Gastroenteritis #Norovirus #Campylobacter #Salmonella #EColi #Diarrhoea #Vomiting #MedicalRevision #MSRAQuiz #PassTheMSRA #RevisionPodcast