Ideal for secondary schools and colleges, this antibiotic mast ring enables efficient testing of Gram negative bacteria for antibiotic susceptibility, supporting practical microbiology lessons. Each ring allows simultaneous application of eight different antibiotics, making it easy for teachers to demonstrate resistance and effectiveness in a single experiment.

• Contains 100 paper rings, each 65mm in diameter

• Each ring has eight projecting arms, each impregnated with a different antibiotic

• Antibiotics included: Ampicillin, Cephalothin, Colistin Sulphate, Gentamicin, Streptomycin, Sulphatriad, Tetracycline, Cortrimoxazole

• Designed for use with Gram negative organisms

• Antibiotics include:

  • Ampicillin 10µg

  • Cephalothin 5µg

  • Colistin Sulphate 25µg

  • Gentamicin 10µg

  • Streptomycin 10µg

  • Sulphatriad 200µg

  • Tetracycline 25µg

  • Cortrimoxazole 25µg