Infectious Disease Tutorial
 
Introduction

Case1: Vomiting 

Case 2: Cough & fever

Case 3: Bruising 

Case 4: Sore throat

Case 5: Jaundice

Case 6: Flu & fever

Case 7: Diarrhea

Case 8: Black Robe 

Case 9: Back Pain

Catching the beast

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Quiz Please

 More ways of identifying the bug.
 
  • Blood and cerebral spinal fluid may be contaminated.
    • It's virtually impossible to sterilize the skin.
    • There's a small chance of skin flora contamination.
    • In the case of blood cultures, 2 sets (aerobic & anaerobic) per febrile episode are recommended.

 
  • H. pylori, for instance, we don't culture.
    • We take advantage of the urease the bug makes.
    • It starts with a gastric mucosal biopsy.
    • The biopsy is placed in agar containing urea.
    • If the bug is present, its urease will hydrolyze the urea, causing a pH shift and color change.
  • PCR and nucleic acid probes.
    • Very rapid ID: gonorrhea, for example. (Probe)
    • Viruses, especially HIV loads. (PCR)
    • Forensic and ancient DNA samples. (PCR)
 
More bug identification.                                                                         Back

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