In antibiotic development and quality control, there is no room for uncertainty. You need precise, reliable potency data to demonstrate effectiveness, meet regulatory expectations, and protect patient safety. Even minor variability in assay performance can delay product release and impact market timelines. Our team of experts in our Toronto laboratory delivers robust, GMP-compliant antibiotic potency testing using USP <81> microbial assays for a broad range of antibiotic products. Our team provides accurate, reproducible results—so you can move forward with confidence.

Reliable potency testing. Proven microbiology expertise.

Our GMP microbiology laboratory evaluates antibiotic activity across 29 compendial antibiotics, as well as non-compendial molecules. We go beyond standard testing to ensure your product performs as intended—effectively inhibiting target microorganisms.

Product Types:

• Ointments and creams
• Ophthalmic solutions
• Feed additives
• Complex or novel formulations

Methods tailored to your product and molecule

We apply validated compendial methods and develop customised approaches when needed, selecting the most appropriate technique for your product:

• Cylinder Plate Method (agar diffusion). Ideal for antibiotics such as Bacitracin, Neomycin, Polymyxin B, and Vancomycin, this method measures zones of inhibition to determine potency.
• Turbidimetric Assay (growth inhibition in liquid media). Designed for antibiotics like Tylosin and Gramicidin, this method quantifies microbial growth response to assess activity.

For emerging or non-compendial antibiotics, our scientists develop and optimise methods to ensure accuracy, sensitivity, and regulatory alignment.

Confidence built into every result

All antibiotic formulations require assay verification to confirm performance and establish acceptable confidence intervals. We design and execute verification studies that ensure your method delivers consistent and defensible results—supporting regulatory submissions and routine QC testing.

A partner that keeps your program on track

When timelines are tight and expectations are high, you need more than a testing lab—you need a partner who understands your challenges. Our experienced microbiologists work closely with you to:

• Optimise extraction and recovery from complex matrices
• Ensure method suitability across product types
• Deliver accurate results with reliable turnaround times
• Maintain full GMP compliance throughout your program

With deep expertise across microbial assay techniques and antibiotic classes, our experts in Toronto partner to reduce risk, avoid delays, and bring safe, effective products to market faster.

Get in touch

Accurate, reliable results from Eurofins BioPharma Product Testing.

Contact us