革兰氏染色剂

定义

A 革兰氏染色剂 is a test used to identify bacteria. It is one of the most common ways to quickly diagnose bacterial infection in the body.

选择的名字

Urethral discharge - 革兰氏染色剂; Feces - 革兰氏染色剂; Stool - 革兰氏染色剂; Joint fluid - 革兰氏染色剂; Pericardial fluid - 革兰氏染色剂; 革兰氏染色剂 of urethral discharge; 革兰氏染色剂 of the cervix; Pleural fluid - 革兰氏染色剂; Sputum - 革兰氏染色剂; Skin lesion - 革兰氏染色剂; 革兰氏染色剂 of skin lesion; 革兰氏染色剂 of tissue biopsy

How the Test is Performed

How the test is performed depends on what tissue or fluid from your body is being tested. The test may be quite simple, or you may need to prepare ahead of time.

• You may need to provide a sputum, urine, or stool sample.
• Your health care provider may use a needle to take fluid from your body to test. This could be from a joint, from the sac around your heart, or from the space around your lungs.
• Your provider may need to take a tissue sample, such as from your cervix or skin.

The sample is sent to a laboratory.

• A small amount is spread in a very thin layer on a glass slide. 这叫做涂片.
• A series of stains are added to the sample.
• A lab team member examines the stained smear under the microscope, looking for bacteria.
• The color, size, and shape of the cells help identify the specific type of bacteria.

How to Prepare for the Test

Your provider will tell you what to do to prepare for the test. For some types of tests, you will not need to do anything.

考试的感觉如何

How the test will feel depends on the method used to take a sample. You may not feel anything, or you may feel pressure and mild pain, such as during a biopsy. You may be given some form of pain medicine so you have little or no pain.

Why the Test is Performed

You may have this test to diagnose an infection caused by bacteria. It can also identify the type of bacteria causing the infection.

This test can help find the cause of various health problems, including:

• Intestinal infection or illness
• Sexually transmitted diseases (STDs)
• Unexplained swelling or joint pain
• Signs of a heart infection or fluid buildup in the thin sac that surrounds the heart (pericardium)
• Signs of infection of the space around the lungs (pleural space)
• Cough that will not go away, or if you are coughing up material with a foul odor or odd color
• 感染性皮肤溃疡

正常的结果

A normal result means that no bacteria or only "friendly" bacteria were found. Some types of bacteria normally live in certain areas of the body, such as the intestines. Bacteria normally don't live in other areas, such as the brain or spinal fluid.

Talk to your provider about the meaning of your specific test results.

What Abnormal Results Mean

Abnormal results may indicate an infection. You will need further tests, such as a culture, to find out more about the infection.

风险

Your risks depend on the method used to remove tissue or fluid from your body. You may have no risk at all. Other risks are rare, but may include:

• 感染
• 出血
• 心脏或肺穿刺
• 肺功能衰竭,
• 呼吸困难
• 疤痕

参考文献

Plourde AR, Beavis KG. Specimen collection and handling for diagnosis of infectious diseases. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24日艾德. Philadelphia, PA: Elsevier; 2022:chap 66.

沃杰沃达m，斯坦帕克m. 医学细菌学. 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.