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Research ArticleTechnology/Application

Sterility Testing of Injectable Products: Evaluation of the Growth-based BacT/ALERT® 3D™ Dual T Culture System

Stefan J. Kaiser, Nico T. Mutters, Jürgen Backhaus, Uwe Frank and Frank Günther
PDA Journal of Pharmaceutical Science and Technology November 2016, 70 (6) 568-576; DOI: https://doi.org/10.5731/pdajpst.2016.006460
Stefan J. Kaiser
1Department of Infectious Diseases and
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Nico T. Mutters
1Department of Infectious Diseases and
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Jürgen Backhaus
2Department of Pharmacy, Heidelberg University Hospital, Heidelberg, Germany
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Uwe Frank
1Department of Infectious Diseases and
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Frank Günther
1Department of Infectious Diseases and
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  • For correspondence: frank.guenther@med.uni-heidelberg.de
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Abstract

Sterility testing as described in the European Pharmacopoeia Chapter 2.6.1 as well as the United States Pharmacopeia Chapter 71 requires a 14 day incubation period of the test product in two different media and at two different temperatures. Because of extensive personnel requirements for test performance and quality assurance, alternative and partially automated methods for product sterility testing are of interest. The study objective was to evaluate the applicability of the BacT/ALERT® 3D™ Dual T system (Biomérieux, Nürtingen, Germany) for detection of microbial contaminants according to current pharmacopoeia standards. In addition, we compared the BacT/ALERT® 3D™ Dual T system to conventional pharmacopoeia sterility testing using the direct inoculation method. The results showed no significant disadvantages of sterility testing by BacT/ALERT® 3D™ Dual T compared to the direct inoculation method regarding the ability to detect microbial contamination. Furthermore, product testing using the BacT/ALERT® 3D™ Dual T system met the compendia requirements for method qualification. Altogether, our data provide evidence that the BacT/ALERT® 3D™ Dual T system is a promising alternative for sterility testing of injectable products of sample volume below 10 mL and without antimicrobial activity.

LAY ABSTRACT: Sterility is defined as the freedom from the presence of viable microorganisms. Injectable pharmaceutical products that are sometimes used for treatment of patients need to be free of microorganisms and therefore tested in the laboratory to confirm sterility. The testing procedures are described in detail in the European Pharmacopoeia. To test for sterility, the products need to be incubated for 14 days at two different temperatures and using two different growth media to ensure growth of various microorganisms. These tests, however, are cost- and labor-intensive. Therefore, we sought to use an automated system to reduce costs and hands-on time, as well as to improve quality assurance. The study objective was to evaluate the applicability of the automated BacT/ALERT® 3D™ Dual T system (Biomérieux, Nürtingen, Germany) for detection of microorganisms according to current pharmacopeia standards. We compared the BacT/ALERT® 3D™ Dual T system to standard sterility testing using the so-called direct inoculation method. The results showed no major disadvantages of sterility testing by the automated system compared to the standard method with regard to the detection level of microorganisms. Furthermore, product testing using the BacT/ALERT® 3D™ Dual T system met the compendia requirements for method qualification. Additionally, the new automated method provided reliable results and promises a higher robustness to human errors than do standard manual methods, which might reduce the potential for errors and improves quality assurance. Altogether, our data provide evidence that the BacT/ALERT® 3D™ Dual T system is a promising alternative for sterility testing of injectable products.

  • Sterility testing
  • BacT/ALERT® 3D™ Dual T
  • Rapid microbiological method
  • Microbiological quality control
  • © PDA, Inc. 2016
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PDA Journal of Pharmaceutical Science and Technology: 70 (6)
PDA Journal of Pharmaceutical Science and Technology
Vol. 70, Issue 6
November/December 2016
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Sterility Testing of Injectable Products: Evaluation of the Growth-based BacT/ALERT® 3D™ Dual T Culture System
Stefan J. Kaiser, Nico T. Mutters, Jürgen Backhaus, Uwe Frank, Frank Günther
PDA Journal of Pharmaceutical Science and Technology Nov 2016, 70 (6) 568-576; DOI: 10.5731/pdajpst.2016.006460

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Sterility Testing of Injectable Products: Evaluation of the Growth-based BacT/ALERT® 3D™ Dual T Culture System
Stefan J. Kaiser, Nico T. Mutters, Jürgen Backhaus, Uwe Frank, Frank Günther
PDA Journal of Pharmaceutical Science and Technology Nov 2016, 70 (6) 568-576; DOI: 10.5731/pdajpst.2016.006460
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Keywords

  • Sterility testing
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  • Rapid microbiological method
  • Microbiological quality control

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