Download BIOS 3420/5420 Principles of Physiology Laboratory

Case of Sick Student
• Fever 105
• Swollen throat
glands
• Sore throat
• Based on throat
seems to be
bacterial
Tests and Results
• First step, Strep
test:
– Negative Result
• Could be viral
instead
• Recommendation
– Rest, fluids,
Tylenol for fever
3 days later:
• Student still very ill
• Redo strep test, still
neg
– Strep test only tests
for Strep A
– Could be C or G
strains
– Order Follow up
culture
• Give penicillin
10 days later:
• Student still very ill
• Student works in lab
with penicillinresistance bacteria
• Follow up cultures
confirm penicillinresistance
• Switch meds!
Penicillin
Control
Penicillin
Student
Don’t Assume!!
• Can have False Negatives on Tests
• Order Cultures for possible bacterial
infections
• Check for drug-resistant strains
• Check patient history before prescribing
meds