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Evaluation of the environmental contamination in microbiology Which strategy to adopt?

The culture of micro-organisms exposes to the risk of microbiological contamination at all stages of the analysis: inoculation on culture media, incubation, and observation of cultures. During our accreditation renewal audit, a surveillance point was notified, regarding the lack of consideration of the risk of microbiological contamination. Its mastery mainly relies on cleaning/disinfection operations and their traceability. In addition, several strategies based on environmental sampling or indicators can be performed. We propose a risk analysis in order to present these strategies.