Culture - colonic tissue

定义

A colonic tissue culture is a lab test to check for the cause of disease. The sample of tissue for the test is taken from the large intestine during a sigmoidoscopy or 结肠镜检查.

选择的名字

Colonic tissue culture

How the Test is Performed

The health care provider removes a piece of tissue from your large intestine. This is done during a sigmoidoscopy or 结肠镜检查.

• The sample is sent to a lab.
• It is placed in a special dish that contains a gel. Bacteria and other organisms can grow in this gel. The dish is then stored at a certain temperature.
• The lab team checks the sample daily. They check to see if 细菌, viruses, or fungi have grown.

If certain germs grow, more tests will be done to identify them. This helps decide the best treatment.

How to Prepare for the Test

There is no specific preparation needed for a culture. In some cases, the provider performing the exam may recommend using an enema before the exam.

How the Test will Feel

Once the sample is taken, the culture does not involve you. Therefore, there is no pain.

Why the Test is Performed

Your provider may order this test if you have signs or symptoms of a large intestine infection. A culture is often done when other tests, such as a 凳子上的文化, could not identify the cause of infection.

正常的结果

A normal result means that no disease-causing organisms have grown in the lab dish.

Some "healthy" 细菌, called bowel flora, are normally found in the gut. The growth of such 细菌 during this test does not mean there is an infection.

Normal value ranges may vary slightly among different laboratories. Talk to your provider about your test results.

What Abnormal Results Mean

An abnormal result means that disease-causing organisms have grown in the lab dish. These organisms may include:

• Clostridioides difficile 细菌
• 巨细胞病毒
• Mycobacterium tuberculosis 细菌
• Salmonella 细菌
• 志贺氏杆菌细菌

These organisms may lead to colon infections or 腹泻.

风险

There is very minimal risk associated with the procedure. In rare cases, excessive bleeding could occur when a tissue sample is taken. 

参考文献

DuPont HL, Okhuysen PC. Approach to the patient with suspected enteric infection. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap 267.

Melia JMP, Sears CL. Infectious enteritis and proctocolitis. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 11日艾德. Philadelphia, PA: Elsevier; 2021:chap 110.

Siddiqi HA, Rabinowitz S, Axiotis CA. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24日艾德. Philadelphia, PA: Elsevier; 2022:chap 23.

Wojewoda CM, Stempak LM. Medical bacteriology. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24日艾德. Philadelphia, PA: Elsevier; 2022:chap 57.