ID#: 16941
This Petri dish culture plate contained an unknown growth medium, to which an inoculum of Staphylococci sp. bacteria had been applied. Atop the growth medium, antibiotic-impregnated disks had been laid, which gave rise to this example of an antibiotic sensitivity test. The medium was kept at a pH of 7.2. The size of the inhibition zones surrounding the antibiotic-impregnated paper disks, depended on the level of sensitivity the bacteria, present in the agar, had to the antibiotic, as well as the antibiotic's ability to diffuse through the culture medium. The overall pH of the medium, in this case 7.2, also played an important role in influencing the results of this antimicrobial sensitivity study.
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Content Provider(s): CDC
Creation Date: 1971
Photo Credit:
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.