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Evaluation of a revised U.S. Food and Drug Administration method for the detection of Cronobacter in powdered infant

Yi Chen1, Kathy E Noe, Sandra Thompson

  • 1Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA. yi.chen@fda.hhs.gov

Journal of Food Protection
|June 14, 2012
PubMed

Insights

A new U.S. Food and Drug Administration (FDA) method for Cronobacter detection in infant formula is faster and more accurate than the previous standard. This revised method significantly improves Cronobacter analysis in powdered infant formula.

Area of Science:

  • Food safety microbiology
  • Analytical chemistry
  • Microbial detection methods

Background:

  • Cronobacter species are a concern in powdered infant formula.
  • Accurate and rapid detection methods are crucial for public health.
  • The U.S. Food and Drug Administration (FDA) sought to improve existing detection protocols.

Purpose of the Study:

  • To validate a revised FDA method for Cronobacter isolation and detection in powdered infant formula.
  • To compare the performance of the revised method against the reference FDA method.
  • To assess the integration of updated PCR protocols and VITEK 2 systems.

Main Methods:

  • The revised method combines real-time PCR, chromogenic agars, and RAPID ID 32E biochemical tests.
  • A collaborative study involved four laboratories analyzing casein- and soy-based formulas.
  • Formulas were inoculated with various Cronobacter strains for testing.

Main Results:

  • The revised FDA method demonstrated significantly better performance compared to the reference FDA method.
  • Valid results were obtained from 216 test portions and controls.
  • The revised method offers expedited analysis within 24 to 48 hours.

Conclusions:

  • The revised FDA method is a more effective and efficient approach for Cronobacter detection in powdered infant formula.
  • This advancement enhances food safety and reduces analysis time.
  • Further integration of PCR and VITEK 2 is recommended for a complete detection procedure.

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