Daniel and Kelly’s Extraordinary Universe Biofilms (featuring Dr. Katrine Whiteson)
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Apr 16, 2026 Dr. Katrine Whiteson, microbiologist who studies microbial communities and phage therapy, joins to explore biofilms. They chat about tasty SCOBYs in kombucha, the bobtail squid’s glowing symbiosis, and why Legionella in standing water is risky. Conversation covers biofilm defenses, lab models, phage-based treatments, and physical ways to remove sticky microbial communities.
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Biofilms Are Social Microbial Cities
- Biofilms are structured microbial communities embedded in a self-produced sticky matrix.
- Katrine Whiteson explains they let unicellular microbes stick to surfaces, float as clumps, communicate, and face environmental stresses together.
Bobtail Squid Uses Vibrio Biofilm For Camouflage
- The bobtail squid uses a Vibrio biofilm in its light organ to cancel its moonlit shadow at night.
- Katrine recounts one Vibrio entering the light organ after birth, multiplying, quorum sensing, producing light, then being 95% ejected each morning.
Rinse Water Flossers To Prevent Legionella
- Avoid leaving standing water in devices like water flossers because Legionella can form biofilms and grow there.
- Katrina recommends rinsing or using vinegar to flush water flosser reservoirs to prevent aerosolized Legionella causing pneumonia.