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Sensitivity analysis

Definition:

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:



Alternative Names:

Antibiotic sensitivity testing; Antimicrobial susceptibility testing



How the Test is Performed:

After the culture (sample) is collected from you, it is sent to a lab. There, the samples are put in special containers to grow the microorganisms (germs) from the collected samples. Colonies of microorganisms 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 effective treatment.



Risks:

Risks depend on the method used to obtain the specific culture.



References:

Smith MB, LaSala PR, Woods GL. In vitro testing of antimicrobial agents. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 58.




Review Date: 1/31/2015
Reviewed By: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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Goryeb Children's Hospital
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Atlantic Medical Group
1-800-247-9580

Morristown Medical Center

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

Overlook Medical Center

99 Beauvoir Avenue
Summit, NJ 07901
908-522-2000

Newton Medical Center

175 High Street
Newton, NJ 07860
973-383-2121

Chilton Medical Center

97 West Parkway
Pompton Plains, NJ 07444
973-831-5000

Hackettstown Medical Center

651 Willow Grove Street
Hackettstown, NJ 07840
908-852-5100

Goryeb Children's Hospital

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

Affiliated Providers

Atlantic Medical Group

More than 600 community-based health care providers.
1-800-247-9580

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