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This test looks for certain bacteria in a wound or an infection in a fluid sample. These bacteria are called anaerobic because they don't need oxygen to grow.
Infections caused by anaerobic bacteria can occur almost anywhere in your body. These may be oral infections, lung infections, diabetes-related foot infections, infected bites, and gangrene. Finding the specific bacteria that's causing your infection helps your health care provider choose the right treatment.
This test takes up to a week for results. That's because any bacteria from the sample need time to grow so they can be looked at in a lab. An anaerobic culture means the test is done without letting oxygen get to the sample.
You may need this test if your health care provider needs to find out the type of bacteria that's causing an infection in your body. Your provider may order this test based on where the wound is, tissue damage, unpleasant smell from the wound, or a sore related to the infection.
You may also have this test to see whether treatment for an infection is working.
Your health care provider may also order other tests, depending on your symptoms. These tests include:
Complete blood count, or CBC
Imaging studies such as ultrasound or CT scan to find areas of infection or damaged tissue
Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your health care provider.
Normal results are negative, meaning that no bacteria grew in your fluid sample. but you may still have an infection, because anaerobic bacteria are difficult to grow in the lab.
A positive result means that bacteria grew in your fluid sample. But the bacteria that grow in a culture may not be the ones causing your infection.
This test requires a sample of fluid or tissue from your wound or sore. Your health care provider may use a cotton swab to get the sample. Or he or she may use a needle to draw fluid from your wound.
This test poses few risks. You may have pain or discomfort when your health care provider collects the sample.
Anaerobic bacteria are difficult to grow, and some bacteria may not grow in this test. This means you may have a false-negative result. Anaerobic bacteria picked up in the sample that are present in the area of the infection but are not causing the infection can also affect your results.
You don't need to prepare for this test. But be sure your health care provider knows about all medicines, herbs, vitamins, and supplements you are taking. This includes any antibiotics, medicines that don't need a prescription, and any illicit drugs you may use.
Bayhealth is Southern Delaware’s healthcare leader with hospitals in Dover and in Milford. Bayhealth provides a wide range of medical services, including cardiovascular, cancer, orthopaedics and rehabilitation, pediatrics, respiratory care, sleep care, surgical weight loss and women’s services.