Bioburden Testing (ISO 11737-1 & USP )
Ensure the microbiological safety of your healthcare products with precise bioburden determination. Our laboratory provides the essential data needed for sterilization validation and routine manufacturing control.
Bioburden testing is a critical requirement for any medical device that requires sterilization or microbial monitoring. This test determines the total number of viable microorganisms (bacteria and fungi) present on or in a medical device before sterilization. At EBI, we conduct these studies in strict accordance with ISO 11737-1 and USP <61>, providing you with the accurate microbial counts necessary to prove your manufacturing process is under control.
Why Bioburden Testing is Essential
The aim of the study is to determine the bioburden of the medical device to support its safety profile. Bioburden data is used to:
- Validate Sterilization Processes: Ensure that your sterilization method (Gamma, EtO, Steam) is powerful enough to eliminate the existing microbial load.
- Monitor Manufacturing Hygiene: Detect potential contamination issues in the production environment or raw materials.
- Comply with Global Standards: Meet the rygorous requirements of ISO 13485 and the MDR for microbiological safety.
Methodology: Determination of Microbial Populations
The bioburden of test items is assessed using a validated process of removal and cultivation:
- Microbial Removal: The test material provided by the customer should be non-sterile. Microorganisms are removed from the test item surface using specialized techniques such as rinsing, ultrasonication, or agitation.
- Culturing and Incubation: The resulting suspension is filtered or plated onto specific growth media (e.g., TSA for bacteria, SDA for fungi).
- Enumeration: Following a defined incubation period, the colonies are counted (Colony Forming Units – CFU) to calculate the total bioburden per device.
- Correction Factor: We perform recovery efficiency studies to ensure that the removal method is effective and the final count is accurate.
Sample Requirements & Timeline
To ensure statistically significant results, please provide non-sterile samples from your standard production line.
- Minimum Quantity: At least 3 non-sterile samples are required.
- Turnaround Time: The duration is determined based on specific study parameters and incubation requirements.
- Condition: Samples should be provided in their primary packaging to reflect the actual state of the product before sterilization.
Standards & Compliance
EBI’s microbiology laboratory operates under the highest quality standards to ensure your data is regulatory-ready:
- ISO 11737-1: Sterilization of healthcare products – Microbiological methods – Part 1: Determination of a population of microorganisms on products.
- USP <61>: Microbiological Examination of Nonsterile Products: Microbial Enumeration Tests.
How We Work
Discovery & Insight
We begin with an in-depth consultation to understand your needs, challenges, and objectives. This helps us define the right strategy and scientific approach for your project.
Design & Development
Our experts translate your vision into actionable plans — combining innovative research, data, and technology to build precise and reliable solutions.
Delivery & Support
We implement the solution with full transparency and ongoing communication. After delivery, we stay involved — supporting you with optimization, updates, and future improvements.
FAQ: Frequently Asked Questions about Bioburden
Is bioburden testing required for every batch?
For many devices, bioburden is monitored as part of a routine quality control program. The frequency (e.g., quarterly or batch-by-batch) depends on your sterilization validation and risk assessment.
What is a „recovery efficiency” study?
Since no removal method is 100% effective, we perform a validation to see what percentage of microbes are actually removed from your specific device. We then apply a „correction factor” to your results to provide a more accurate estimate of the total population.
Can all materials be accelerated?
If the microbial count exceeds the limits established during your sterilization validation, it may invalidate the sterility assurance level (SAL). EBI can help you investigate the source of contamination, whether it stems from raw materials, water systems, or personnel.
Is bioburden testing required for every batch?
For many devices, bioburden is monitored as part of a routine quality control program. The frequency (e.g., quarterly or batch-by-batch) depends on your sterilization validation and risk assessment.
What is a "recovery efficiency" study?
Since no removal method is 100% effective, we perform a validation to see what percentage of microbes are actually removed from your specific device. We then apply a „correction factor” to your results to provide a more accurate estimate of the total population.
What happens if my bioburden is too high?
If the microbial count exceeds the limits established during your sterilization validation, it may invalidate the sterility assurance level (SAL). EBI can help you investigate the source of contamination, whether it stems from raw materials, water systems, or personnel.
Contact with us
We’re open to collaboration and research partnerships. Fill out the form — our team will respond as soon as possible.
Location:
Europejski Instytut Biomedyczny sp. z o.o.
ul. Bartycka 63A lok. 6, 00-716 Warszawa
Mail:
contact@ebi.bio
Phone:
+48 22 780 06 32
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