Biotec Diagnostics UK provide a comprehensive, up-to-date line of Antimicrobial Sensitivity DISCS which is a great complement to our complete Antimicrobial products line offering an ideal method for manual susceptibility testing or as a back-up to automated methods. Susceptibility Disks. Our products range developed from a simple range of discs to include identification products, computerised sensitivity and identification systems, freeze dried antibiotics for the determination of antibiotic susceptibility in plates and freeze dried selective isolation supplements.