Risky or Not?

A short podcast about everyday risks from germs

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A man in cozy pajamas stands in his softly lit bedroom, pouring a glass of water into a sleek white humidifier on the floor. The room features a neatly made bed, a bedside table with a lamp, and a window with slightly open curtains, creating a warm, calm atmosphere.

736. Reusing Old Sleep-Water in Cold Humidifiers

February 21, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of using water from a bedside glass to refill a humidifier.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Molecular analysis of single room humidifier bacteriology - ScienceDirect
  • Severe neonatal legionellosis associated with use of home humidifiers – A case report - ScienceDirect
  • Legionella - an overview | ScienceDirect Topics
  • A review of legionnaires’ disease and public water systems – Scientific considerations, uncertainties and recommendations - ScienceDirect


February 21, 2025 /Don Schaffner
Water, Humidifier, Cross-contamination, Legionella
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118. Potting Soil

March 12, 2021 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from potting soil.
Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Exposure to potting soils and compost material as potential sources of Legionella pneumophilia in Australia - ScienceDirect
  • ‎Pine Species Provide a Niche for Legionella Longbeachae
  • Does Potting Mix Cause Legionnaires' Disease in Gardeners? - Garden Myths
  • Legionella longbeachae and Legionellosis
  • Legionnaires Disease Cause and Spread | Legionella | CDC
  • Legionnaires' Disease Associated With Potting Soil --- California, Oregon, and Washington, May--June 2000
  • An outbreak of Pontiac fever due to Legionella longbeachae serogroup 2 found in potting mix in a horticultural nursery in New Zealand | Epidemiology & Infection | Cambridge Core
  • Popcorn Lung – Causes, Symptoms, Diagnosis, and Treatment
  • Risk Factors for Legionella longbeachae Legionnaires’ Disease, New Zealand
March 12, 2021 /Don Schaffner
Legionella, Potting Soil

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