This chapter introduces severe infectious diseases, neurological disorders, autoimmune conditions, and chronic illnesses, showing how they affect different body systems.
It begins with Marburg Virus Disease, then expands into a range of important medical conditions.
🦠 Marburg Virus Disease
Marburg virus disease (MVD) is a severe viral haemorrhagic fever caused by the Marburg virus, related to Ebola.
⚠️ Cause & Transmission
- Caused by Marburg virus (Filoviridae family)
-
Spread through:
- Direct contact with infected bodily fluids
- Contaminated surfaces or materials
- Exposure to fruit bats (Rousettus aegyptiacus) in caves or mines
🌍 Outbreaks
- Mostly found in sub-Saharan Africa
-
Countries include:
- Uganda
- Angola
- Ghana
- Tanzania
- Often begins with animal exposure and spreads in human populations
⚠️ Symptoms
Symptoms appear suddenly:
- High fever
- Severe headache
- Muscle pain
- Extreme weakness (malaise)
- Nausea and vomiting
- Diarrhoea
- Rash (appears after 3–5 days)
- Internal and external bleeding in severe cases
🧠 Severity
- Mortality rate can reach up to 88%
- Severe dehydration and organ failure are common
🏥 Treatment
- No specific cure or approved vaccine
-
Supportive care only:
- Fluids (oral or IV)
- Symptom management
- Hospital intensive care
🦟 Malaria
Malaria is a mosquito-borne parasitic disease.
- Caused by Plasmodium parasites
- Spread through infected mosquito bites
⚠️ Symptoms:
- Fever
- Chills
- Sweating
- Fatigue
💊 Treatment:
- Antimalarial medications
- Some drug resistance exists
🦠 Measles
Measles is a highly contagious viral infection.
⚠️ Symptoms:
- High fever
- Rash spreading across body
- Cough and runny nose
🛡️ Prevention:
- Vaccination (MMR vaccine)
🧠 Meningitis
Meningitis is inflammation of the brain and spinal cord membranes.
⚠️ Symptoms:
- Severe headache
- Neck stiffness
- Fever
- Sensitivity to light
🧪 Cause:
- Viral or bacterial infections
🔄 Mpox (Monkeypox)
Mpox is a viral infection spread through close contact.
⚠️ Symptoms:
- Flu-like illness
- Skin rash with lesions
- Fever and swollen lymph nodes
🦠 MRSA (Antibiotic-Resistant Infection)
MRSA is a bacterial infection resistant to many antibiotics.
⚠️ Effects:
- Skin infections
- Wound infections
- Can become severe if it spreads
🧠 Multiple Sclerosis (MS)
MS is an autoimmune neurological disease.
⚠️ What happens:
- Immune system attacks nerve coverings (myelin)
- Disrupts brain-to-body communication
⚠️ Symptoms:
- Muscle weakness
- Vision problems
- Fatigue
- Coordination issues
💪 Myasthenia Gravis
A neuromuscular autoimmune disorder.
⚠️ Effects:
- Weakness in voluntary muscles
- Worsens with activity
- Improves with rest
😴 Narcolepsy
A chronic sleep disorder.
⚠️ Symptoms:
- Sudden sleep attacks
- Excessive daytime sleepiness
- Loss of muscle control (cataplexy)
🧠 Migraine
A neurological headache disorder.
⚠️ Symptoms:
- Severe, throbbing headache
- Nausea
- Sensitivity to light and sound
🦠 Mononucleosis (“Mono”)
A viral infection (often Epstein–Barr virus).
⚠️ Symptoms:
- Extreme fatigue
- Sore throat
- Fever
- Swollen lymph nodes
🦠 Mumps
A contagious viral illness.
⚠️ Symptoms:
- Swelling of salivary glands
- Fever
- Pain when chewing or swallowing
🧠 Naegleria fowleri Infection
A rare but fatal brain infection caused by an amoeba.
⚠️ Key facts:
- Found in warm freshwater
- Enters through the nose
- Causes rapid brain damage
🩸 Menopause
A natural biological stage in life.
📌 Definition:
- Permanent end of menstruation
- Diagnosed after 12 months without a period
🔬 Key Idea (Across All Conditions)
This chapter shows a wide range of diseases affecting:
- 🦠 Infectious systems (Marburg, malaria, measles, mpox)
- 🧠 Nervous system (MS, migraines, narcolepsy, meningitis)
- 💪 Muscle/immune system (myasthenia gravis)
- 🧬 Chronic infections and resistance (MRSA)
- 🧍 Natural life processes (menopause)
🧠 Study Questions (Answers found in text)
🔍 Understanding
- What causes Marburg virus disease?
- How is malaria transmitted?
- What is meningitis?
⚠️ Symptoms
- What are early symptoms of Marburg virus disease?
- What is a common symptom of measles?
- What happens during a migraine?
🧬 Comparison
- How is MRSA different from viral infections?
- What do MS and myasthenia gravis have in common?
- How does narcolepsy affect daily life?
🏥 Severity & Risk
- Why is Marburg virus so dangerous?
- Why is Naegleria fowleri infection usually fatal?
📌 Final Summary
This chapter introduces a wide spectrum of medical conditions, showing how:
- Viruses, bacteria, parasites, and autoimmune disorders affect the body
- Some conditions are acute and deadly (Marburg, Naegleria)
- Others are chronic and manageable (MS, narcolepsy, migraine)
- Prevention, vaccination, and early treatment are key across many diseases
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