Sensitivity analysis determines the effectiveness of antibiotics against microorganisms (germs) such as bacteria that have been isolated from cultures.
Sensitivity analysis may be done along with:
Blood culture Clean catchurine culture or catheterized specimenurine culture Sputum culture Culture from endocervix(female genital tract) Throat culture
- Wound and other cultures
Antibiotic sensitivity testing; Antimicrobial susceptibility testing
How the Test is Performed
After the sample is collected from you, it is sent to a lab. There, the samples are put in special containers to grow the germs from the collected samples. Colonies of germs are combined with different antibiotics to see how well each antibiotic stops each colony from growing. The test determines how effective each antibiotic is against a given organism.
How to Prepare for the Test
Follow your health care provider's instructions on how to prepare for the method used to obtain the culture.
How the Test will Feel
The way the test feels depends on the method used to obtain the culture.
Why the Test is Performed
The test shows which antibiotic drugs should be used to treat an infection.
Many organisms are resistant to certain antibiotics. Sensitivity tests are important in helping find the right antibiotic for you. Your provider may start you on one antibiotic, but later change you to another because of the results of sensitivity analysis.
What Abnormal Results Mean
If the organism shows resistance to the antibiotics used in the test, those antibiotics will not be an effective treatment.
Risks depend on the method used to obtain the specific culture.
Charnot-Katsikas A, Harrington A. In vitro testing of antimicrobial agents. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 58.
Review Date: 02/02/2023
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright ©2019 A.D.A.M., Inc., as modified by University of California San Francisco. Any duplication or distribution of the information contained herein is strictly prohibited.
Information developed by A.D.A.M., Inc. regarding tests and test results may not directly correspond with information provided by UCSF Health. Please discuss with your doctor any questions or concerns you may have.