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Legionella enumeration by ISO 11731: Limits & Biases
16/02/2026 9:00 am
Why can results differ even when everyone follows the same ISO standard?
In this session, we’ll highlight the key biases introduced across the main steps of the method and explain why ISO 11731 offers multiple protocol options—each reflecting real trade-offs labs must manage.
You’ll leave with a clear comprehension of the framework, and discuss method choices with more clarity.
What you will learn
- Why ISO 11731 is complex, and what are the consequences
- Where the most common biases occur and how they impact recovery / comparability
- Why multiple protocol variants exist and how to think about trade-offs
- Practical ideas to improve consistency and result interpretation
- How risk management could be impacted and potentially misleading by variability of results
Who should attend
Microbiology labs and service providers performing Legionella culture, lab managers/QA, and professionals involved in Legionella risk management – Hygienists, advisors…
This webinar will be available in replay and have another session planned on Thursday February the 19th – 17:00 CET
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