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<p>The contamination of milk powder by pathogens such as <i>Cronobacter</i> spp. and <i>Salmonella</i> spp. represents a major public health risk, particularly as the primary consumers of milk powder, infants, have heightened vulnerability to bacterial infection. In the face of this danger, analytical laboratories should implement and practice suitable methods for the detection of these microorganisms with high specificity and sensitivity. For this reason, BIPEA (Bureau Interprofessionnel d’Études Analytiques) launched a new proficiency testing program for the detection of <i>Cronobacter</i> spp. in samples of milk powder in 2019, and detection of <i>Salmonella</i> spp. in the same samples was added to these tests in 2023. This paper presents the design and implementation of the program, as well as a detailed analysis of laboratory results and systems for the evaluation of qualitative proficiency testing performances. Results from these tests are encouraging, as the majority of laboratories are able to correctly identify both contaminated and uncontaminated samples. Participation in proficiency testing programs is an important quality control tool for analytical laboratories to assess and demonstrate their competence to carry out these microbiological analyses, which are critical for public health, and one of the ways to monitor their performance as per the requirements of the ISO/IEC 17025:2017 standard.</p>

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Proficiency tests for the detection of Cronobacter spp. and Salmonella spp. in milk powder

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Colin Howell,
  • Romain Le Neve,
  • Anne Tirard,
  • Sandrine Nguyen,
  • Abdelkader Boubetra

摘要

The contamination of milk powder by pathogens such as Cronobacter spp. and Salmonella spp. represents a major public health risk, particularly as the primary consumers of milk powder, infants, have heightened vulnerability to bacterial infection. In the face of this danger, analytical laboratories should implement and practice suitable methods for the detection of these microorganisms with high specificity and sensitivity. For this reason, BIPEA (Bureau Interprofessionnel d’Études Analytiques) launched a new proficiency testing program for the detection of Cronobacter spp. in samples of milk powder in 2019, and detection of Salmonella spp. in the same samples was added to these tests in 2023. This paper presents the design and implementation of the program, as well as a detailed analysis of laboratory results and systems for the evaluation of qualitative proficiency testing performances. Results from these tests are encouraging, as the majority of laboratories are able to correctly identify both contaminated and uncontaminated samples. Participation in proficiency testing programs is an important quality control tool for analytical laboratories to assess and demonstrate their competence to carry out these microbiological analyses, which are critical for public health, and one of the ways to monitor their performance as per the requirements of the ISO/IEC 17025:2017 standard.