Whatman® Antibiotic Assay Discs

Whatman® Antibiotic Assay Discs are high-quality filter paper discs designed for determining the causal agent of infectious diseases and evaluating microbial sensitivity to antibiotics and chemotherapeutic agents using the inhibition zone method. These assay discs are ideal for preparing custom antibiograms, allowing rational and targeted antibiotic therapy selection in clinical and research microbiology.

Each disc is produced with uniform thickness and a soft texture, enabling efficient absorption of test solutions and even distribution of agents during incubation. The discs are applied to inoculated nutrient agar plates and incubated, where the diameter of the inhibition zone reflects the antimicrobial activity of the test compound.

Key Features

• Suitable for custom antibiotic susceptibility testing (AST)
• Uniform thick soft discs for reliable absorption and retention of solutions
• Manufactured from high-quality filter paper: 440 g/m², 920 µm thickness
• Enables effective quantification of antimicrobial inhibition zones
• Supports rational and selective chemotherapy decisions in clinical practice
• Compatible with standard Kirby-Bauer disc diffusion methodology
• Available in multiple diameters for method-specific flexibility

Available Formats

Applications

• Antimicrobial susceptibility testing (custom-loaded discs)
• Quantitative assessment of antibiotic efficacy
• Antibiogram profiling in clinical microbiology labs
• Screening of natural or synthetic antimicrobial compounds
• Teaching and research in microbiology and pharmaceutical studies

Whatman® Antibiotic Assay Discs offer precise, reproducible performance in antimicrobial testing by supporting custom disc loading and inhibition zone assessment. Their consistent composition, excellent absorbency, and availability in multiple diameters make them an essential tool for laboratories performing custom AST, antibiotic potency evaluations, or R&D screening of antimicrobial agents.