Inf: Meningitis: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Meningitis🎧 A clear, high-yield breakdown of this life-threatening CNS infection, perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• Meningitis is the inflammation of the meninges, the protective membranes surrounding the brain and spinal cord.• Most commonly caused by bacterial or viral infections, but can also be fungal or parasitic.📌 Causes & Risk Factors• Bacterial: Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae• Viral: Enteroviruses, mumps, herpes• Fungal/TB: Immunocompromised patients• Risk Factors:Extremes of age (infants, elderly)Immunocompromised (e.g. HIV)Cochlear implantsClose contact/living in crowded environments💡 Mnemonic: “SPNH” – Streptococcus, Pneumococcus, Neisseria, Haemophilus📌 Pathophysiology• Pathogen enters CNS → triggers immune response → inflammation →• Increased CSF white cells, swelling → raised intracranial pressure (ICP)• This pressure causes many of the dangerous symptoms and complications📌 Symptoms• Classic: Headache, fever, neck stiffness, photophobia• Also: Altered mental state, nausea, vomiting, seizures• In infants: Irritability, poor feeding, bulging fontanelle💡 Mnemonic: “My Head and Neck Felt Like Mind Puking” – Headache, Neck stiffness, Fever, Light sensitivity, Mental status, Puking📌 Differential Diagnosis• Viral encephalitis• Subarachnoid haemorrhage• Brain abscess• Autoimmune conditions (e.g. SLE)📌 Diagnosis• Lumbar puncture for CSF analysis is gold standard• Look at:Cell count (polymorphs = bacterial; lymphocytes = viral/TB)Protein (↑ in bacterial & TB)Glucose (↓ in bacterial & TB)Culture, PCR, and microscopy• Blood cultures, CT head (if raised ICP suspected), FBC, CRP📌 CSF Interpretation Summary• Bacterial: Cloudy, ↓ glucose, ↑ protein, polymorphs• Viral: Clear, normal glucose, normal/slightly ↑ protein, lymphocytes• TB/Fungal: Slightly cloudy, ↓ glucose, ↑ protein, lymphocytes📌 Management• Medical emergency – treat immediately if suspected• Empirical IV antibiotics based on age:<3 months: Cefotaxime + Amoxicillin3 months–50 yrs: Cefotaxime or Ceftriaxone50 yrs: Cefotaxime/Ceftriaxone + Amoxicillin (Listeria cover)• Identified pathogen:Meningococcal: IV benzylpenicillin or cefotaxime/ceftriaxonePneumococcal/Haemophilus: IV cefotaxime/ceftriaxoneListeria: IV amoxicillin + gentamicin• Dexamethasone: Especially for pneumococcal meningitis• Allergy: Consider IV chloramphenicol• Immediate transfer to hospital• Benzylpenicillin IM in community if meningococcal disease suspected and does not delay hospital transfer📌 Contacts & Prophylaxis• Meningococcal:Household/kissing contacts → ciprofloxacin or rifampicinMeningococcal vaccine also recommended• Pneumococcal: Prophylaxis not routinely needed (UKHSA guidance)📌 Complications• Hearing loss, seizures, neurological deficits• Hydrocephalus, brain damage, septic shock, death💡 Mnemonic: “Brain-Body-Bad” – Brain (damage/seizure), Body (shock), Bad (hearing loss/death)📌 Prognosis• Bacterial: Potentially fatal if untreated; prognosis depends on rapid recognition & treatment• Viral: Generally good recovery• Long-term sequelae include hearing loss, cognitive issues📎 More MSRA Resources for Meningitis📝 Revision Notes: https://www.passthemsra.com/topic/meningitis-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/meningitis-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/meningitis-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/meningitis-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 #Meningitis