Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia.
a laboratory method for testing the effectiveness of antibiotics. It is usually done on organisms known to be potentially resistant to antibiotic therapy in vitro. A report of a "resistant" finding means the antibiotic is not effective in inhibiting the growth of a pathogen, whereas use of an effective antibiotic results in a "sensitive" report. See also antibiotic sensitivity test.
A test that determines which antibiotics will kill the bacteria that has been isolated from a culture.