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Sensitivity analysis determines the effectiveness of antibiotics against microorganisms such as bacteria that have been isolated from cultures.
Sensitivity analysis may be performed along with:
- Blood culture
- Clean catchurine culture or catheterized specimen urine culture
- Sputum culture
- Culture from endocervix
- Throat culture
- Wound and other cultures
Antibiotic sensitivity
How the test is performedColonies of microorganisms are combined with different antibiotics to see how well each antibiotic stops each colony from growing. The test determines the effectiveness of each antibiotic against a particular organism.
How to prepare for the testThere is no special preparation.
How the test will feelThe way the test feels depends upon the method used for obtaining the specific culture.
Why the test is performedThe test shows which antibiotic drugs should be used to treat an infection.
Because many organisms continue to show resistance against various antibiotics, sensitivity tests have become more and more important. Your doctor may start you on one antibiotic, but later change you to another one because of the results of sensitivity analysis.
What abnormal results meanIf the organism shows drug resistance to the antibiotics used in the test, then those antibiotics will not be effective treatment.
What the risks areThe risks depend upon the method used for obtaining the specific culture.
ReferencesSmith MB, Woods GL. In vitro testing of antimicrobial agents. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa: Saunders Elsevier; 2006:chap 57.
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