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Medical Microbiology Lecture Notes Ppt

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Medical Microbiology Lecture Notes PPT

If you'd like, I can focus on a specific group of pathogens (like bacteria or viruses) or provide a more detailed breakdown of diagnostic laboratory techniques. Medical microbiology | PPTX - Slideshare medical microbiology lecture notes ppt

Slide 13: Bacterial Toxins – Exotoxins vs Endotoxin

| Feature | Exotoxin | Endotoxin (LPS) | |---------|----------|-----------------| | Source | Gram (+ & -) | Gram (-) outer membrane | | Chemistry | Protein | Lipid A | | Heat stability | Labile (except superantigens) | Stable | | Action | Specific (e.g., neuro, enterotoxin) | Nonspecific (TNF, IL-1 → fever, shock) | | Example | Tetanus toxin, Cholera toxin | E. coli septic shock | Entamoeba histolytica – Amebic dysentery, liver abscess

Incubation: Allowing the sample to grow under controlled conditions. Isolation: Separating individual species. Inspection: Observing macroscopic and microscopic growth. Influenza: Segmented RNA, antigenic drift/shift

• Entamoeba histolytica – Amebic dysentery, liver abscess.
• Giardia lamblia – “Beaver fever” (fatty, foul-smelling diarrhea).
• Ascaris lumbricoides – Large roundworm (egg in stool).
• Taenia solium – Pork tapeworm (cysticercosis risk).

• Influenza: Segmented RNA, antigenic drift/shift.
• SARS-CoV-2: Coronavirus, spike protein binds ACE2.
• RSV: Leading cause of bronchiolitis in infants.
• Rhinovirus: Common cold.