S2D: The Symptom to Diagnosis Podcast COVID-19
Oct 21, 2021
Jennifer Pisano, infectious disease specialist and antibiotic stewardship leader at the University of Chicago. She breaks down COVID clinical phases and anosmia. They compare antigen versus PCR testing. Treatment timing, monoclonal antibodies, vaccine prevention, and ACE2-related multisystem effects are explored.
AI Snips
Chapters
Transcript
Episode notes
Early COVID Case With Loss Of Smell And Mild Course
- A 25-year-old grad student returned home in March 2020 and developed fever, sore throat, headache, GI upset, and anosmia just after arrival.
- Her nasopharyngeal PCR returned positive in ~1 day, she felt bad for 5 days, recovered by 3 weeks, and no household contacts developed illness.
Two Distinct Phases Explain Varied COVID Presentations
- COVID-19 presentation is highly variable with many asymptomatic cases and anosmia as the most specific symptom.
- Infection has a viral phase with mild upper respiratory or GI symptoms and an inflammatory phase causing shortness of breath and hospitalization.
When To Use Antigen Tests Versus PCR
- Use antigen tests for rapid symptomatic screening but rely on PCR for asymptomatic or post-exposure testing.
- Treat antigen results as a proxy for infectivity, not an absolute diagnosis, because timing and sample affect sensitivity.