Antibiotic Zone Reader

The antibiotic zone reader provides a rapid yet accurate method for determining the strength of antibiotic materials by measuring the diameter of an inhibition zone in a petri-dish. The antibiotic zone reader's discs are placed on a petri-dish prepared with agar and inoculated with bacteria. After incubation, the bacteria cover the entire dish except for a circular inhibition zone around, it being a function of the strength of the antibiotic.