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Small intestine aspirate and culture

Definition

Small intestine aspirate and culture is a laboratory test to check for infection in the small intestine.

How the test is performed

A sample of fluid from the small intestine is needed. This requires a procedure called an esophagogastroduodenoscopy (EGD). For more information on this procedure, see EGD .

The fluid is placed in a special dish in the laboratory and observed for growth of bacteria. This is called a culture.

How the test will feel

The laboratory culture test does not involve the patient. For information on how the test to obtain the sample feels, see the article on EGD .

Why the test is performed

Your doctor may order this test if you have signs of too much bacteria growth in the intestinal tract. This usually is not the first test that would be done.

Normally, small amounts of bacteria are present in the small intestine and do not cause disease. However, the test may be done when your doctor suspects that excess growth of intestinal bacteria is causing diarrhea.

Normal Values

No bacteria should be found.

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

What abnormal results mean

Abnormal results may be a sign of infection.

What the risks are

There are no risks associated with a laboratory culture.

For information on risks associated with the procedure done to obtain the sample, see EGD .

References

DuPont HL. Approach to the patient with suspected enteric infection. In: Goldman L, Schafer AI, eds. . 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 291.

Semrad CE. Approach to the patient with diarrhea and malabsorption. In: Goldman L, Schafer AI, eds. . 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 142.

Giannella RA. Infectious enteritis and proctocolitis and bacterial food poisoning. In: Feldman M, Friedman LS, Brandt LJ, eds. . 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 107.

Croft AC, Woods GL. Specimen collection and handling for diagnosis of infectious diseases. In: McPherson RA, Pincus MR, eds. . 22nd ed. Philadelphia, Pa: Saunders Elsevier;2011:chap 63.

Salwen MJ, Siddiqi HA, Gress FG, Bowne WB. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. . 22nd ed. Philadelphia, Pa: Saunders Elsevier;2011:chap 22.  

Fritsche TR, Selvarangan R. Medical parasitology. In: McPherson RA, Pincus MR, eds. . 22nd ed. Philadelphia, Pa: Saunders Elsevier;2011:chap 62. 

Encyclopedia content is provided as information only and not intended to replace the advice and instruction from your personal physician.