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Campylobacter serology test

Campylobacter antibody detection

 

Campylobacter serology test is a blood test to look for antibodies to bacteria called campylobacter.

How the Test is Performed

 

A blood sample is needed.

The sample is sent to a lab. There, tests are done to look for antibodies to campylobacter bacteria. Antibody production increases during the infection. When the illness first starts, few antibodies are detected. For this reason, blood tests may need to be repeated 10 days to 2 weeks later to increase sensitivity.

 

How to Prepare for the Test

 

There is no special preparation.

 

How the Test will Feel

 

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. This soon goes away.

 

Why the Test is Performed

 

This test detects the presence of antibodies to campylobacter in the blood. Campylobacter infection can cause diarrheal illness. A blood test is rarely done to diagnose campylobacter diarrheal illness. It is used if your health care provider thinks you are having complications from this infection, such as reactive arthritis or Guillain-Barré syndrome.

 

Normal Results

 

A normal test result means no antibodies to campylobacter are present. This is called a negative result.

Normal value ranges may vary slightly among different labs. Talk to your provider about the meaning of your specific test results.

 

What Abnormal Results Mean

 

An abnormal (positive) result means that antibodies against campylobacter have been detected. This means you have come in contact with the bacteria.

Tests are often repeated during the course of an illness to detect a rise in antibody levels. This rise helps to confirm an active infection. A low level may be a sign of a previous infection rather than current disease.

 

Risks

 

There is little risk involved with having your blood taken.

Veins vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight, but may include:

  • Excessive bleeding
  • Fainting or feeling lightheaded
  • Blood buildup under the skin (hematoma)
  • Infection (a slight risk any time the skin is broken)

 

 

Open References

References

Allos BM. Campylobacter infections. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 279.

Allos BM, Blaser MJ. Campylobacter jejuni and related species. In: Blaser MJ, Cohen JI, Holland SM, et al, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 10th ed. Philadelphia, PA: Elsevier; 2026:chap 221.

Fleckenstein JM. Approach to the patient with suspected enteric infection. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 262.

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        Review Date: 3/1/2026

        Reviewed By: Jatin M. Vyas, MD, PhD, Roy and Diana Vagelos Professor in Medicine, Columbia University Vagelos College of Physicians and Surgeons, Division of Infectious Diseases, Department of Medicine, New York, NY. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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