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Growth Promotion Test

Accredited Growth Promotion Testing for pharmaceutical microbiology laboratories, culture media qualification and GMP-compliant quality assurance. 

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Growth Promotion Test performed on microbiological culture media in our GMP-compliant laboratory.

Culture Media Qualification for Pharmaceutical Microbiology:
The Cornerstone of Reliable Microbiological Testing

Microbiological culture media assessed for Growth Promotion Testing and GMP-compliant quality assurance.

The Growth Promotion Test (GPT) is a critical element of microbiological quality control within the pharmaceutical industry. It demonstrates that microbiological culture media, whether solid or liquid, reliably support or inhibit the growth of defined test organisms as required by pharmacopoeial specifications.

GPT fulfils an essential regulatory requirement within pharmaceutical microbiology and supports the validity of microbial enumeration, sterility testing and microorganism detection procedures.

As a GMP-certified and DAkkS-accredited laboratory according to DIN EN ISO/IEC 17025, we support the qualification and verification of culture media for reproducible and reliable microbiological analyses.

 

Growth Promotion Testing in Pharmaceutical Microbiology

These tests verify the performance of culture media, and ensure valid microbiological analyses in accordance with regulatory requirements.
Culture media suitability testing to verify microbial growth performance.

Suitability Testing of Culture Media

Verification that solid and liquid media reliably support defined microbial growth.

 

Growth promotion testing using defined pharmacopoeial reference strains.

Use of Defined Reference Strains

Standardized reference organisms such as Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans are used to assess culture media performance.

 

Integration of growth promotion testing into pharmaceutical microbiological analysis.

Integration into Microbiological Testing

Growth Promotion Testing supports microbial enumeration, sterility testing and microorganism detection procedures.

Culture media qualification to ensure reliable microbiological test results.

Ensuring Analytical Quality

Prevents false-negative results caused by culture media with insufficient performance characteristics.

 

Parameter Portfolio

Standardized Growth Promotion Tests verify the functionality of microbiological culture media and support reliable microbiological analyses throughout pharmaceutical quality control.

Growth Promotion Test (GPT)

Assessment of the growth-promoting and growth-inhibiting properties of microbiological culture media.

Methods: Inoculation of defined pharmacopoeial reference organisms, including customer-specific microorganisms where required.

Results: Verification of growth promotion or growth inhibition within specified pharmacopoeial acceptance criteria.

Suitable for: Culture media qualification, GMP quality assurance, microbial enumeration testing, sterility testing and microorganism detection procedures.

 

Culture Media We Test

Growth Promotion Testing applies to both solid and liquid culture media used across microbiological quality control.
The suitability of each medium must be demonstrated before it can be used for reliable microbiological testing
in accordance with pharmacopoeial and GMP requirements.

Solid Culture Media

Assessment of solid agar-based media to verify their ability to support or inhibit the growth of defined reference organisms as required.

Typical media: Tryptic Soy Agar (TSA), Sabouraud Dextrose Agar (SDA), selective agar media and microbiological enumeration media.

Typical applications: Microbial enumeration testing, specified microorganism testing and environmental monitoring.

 

Liquid Culture Media

Verification of nutrient broths and liquid media used in microbiological quality control and sterility testing.

Typical media: Tryptic Soy Broth (TSB), Sabouraud Dextrose Broth and enrichment media.

Typical applications: Sterility testing, microorganism recovery and microbial growth verification.

Selective Culture Media

Assessment of media designed to promote target organisms while suppressing unwanted microbial growth.

Typical media:
Selective media used for specified microorganism testing and contamination investigations.

Typical applications:
Detection of objectionable microorganisms and pharmacopoeial testing procedures.

 

Microbial Enumeration Media

Qualification of media used for TAMC and TYMC determination within pharmaceutical microbiology.

Typical media:
General-purpose media for aerobic bacteria, yeasts and molds.

Typical applications:
Microbial limit testing, routine quality control and batch release testing.

Environmental Monitoring Media

Verification of media used within environmental monitoring programs in GMP-controlled manufacturing environments.

Typical media: Contact plates, settle plates and monitoring agar systems.

Typical applications: Cleanroom monitoring, contamination control and GMP compliance programs.

Regulatory Framework

Growth Promotion Testing is governed by pharmacopoeial requirements, GMP regulations and internationally recognized quality standards. Together, these frameworks ensure that microbiological culture media demonstrate the performance characteristics required for reliable and reproducible microbiological testing.

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Ph. Eur. 01/2025:20612 & Ph. Eur. 01/2021:20613
Define growth promotion, inhibitory and indicative properties testing requirements for culture media, together with supplementary microbiological test chapters.

GMP Certification & DAkkS Accreditation (DIN EN ISO/IEC 17025)
Basis for accredited, GMP-compliant testing of culture media performance.

Related Analytics

Pharmaceutical sample prepared for microbial purity testing in an accredited laboratory.

Microbial Purity

Growth Promotion Testing is an essential prerequisite for reliable microbial purity testing. Qualified culture media ensures the accurate recovery of microorganisms during microbial enumeration testing and the detection of specified microorganisms in accordance with pharmacopoeial requirements.

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Sterility testing performed under aseptic conditions using qualified microbiological culture media.

Sterility Testing

Validated culture media are a prerequisite for reliable sterility testing, ensuring that a negative result reflects true product sterility rather than inadequate media performance.

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