A wound or skin culture is a test to find and identify microbes (including bacteria, fungi or viruses, one a) that may be growing in the skin or in a wound. A sample of skin, tissue or fluid is obtained from the affected area and placed in a container with a substance (called culture medium or culture medium) that helps organisms grow. If there is nothing important, the culture is negative. If there is anything that can cause infection, the culture is positive. The type of organisms were identified with a microscope, chemical tests, or both.Most bacteria can grow in oxygen. They are called aerobes and are usually in the near-surface wounds of the skin (surface). The bacteria which can not grow in the presence of oxygen (anaerobic) are usually in deeper wounds and abscesses. A wound culture can determine if bacteria are aerobic or anaerobic.A fungal culture is performed to determine if an infection is caused by a fungus. A viral culture can be done to determine if an infection is caused by a virus.Some types of bacteria that normally live on or in the body can cause infection if they go to other parts of the body which are not normally found. For example, E. coli normally found in the colon and anus. But if the bacterium E. coli spread from the anus to the urethra, the bacteria can cause urinary tract infection (UTI).If a skin or wound culture is positive, other tests may be done to help you choose the best medication to treat the infection. This is called a sensitivity test.Culture samples also may be collected from the ear or eye, open wounds or closed, or nails and what is done cabello.PorA skin or wound cultivation is performed to:
Finding the cause of an infection in a wound, burn, surgery or injury. An injury includes animal bites, bites, stings marine human or scrapes, cuts and puncture wounds that are more likely to become infected.
Making decisions about the best treatment for an infection. This is called a sensitivity test.PreparingYou do not have to do anything before having this test. If you are taking or have recently taken antibiotics, tell your doctor.Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will do, or what the results mean. To help you understand the importance of this test, fill out the test form is médica.Cómo informationTo collect a sample of fluid or tissue from a wound, a sterile swab is inserted into the wound. The health professional taking the sample can press around the wound and gently rotate the swab to collect as many as possible of tissue or fluid. The swab is then placed in a culture tube either aerobic or anaerobic or both, depending on the type of organism suspected.
A needle can be used to collect fluid from a wound that is covered (crust-over) or an abscess. The fluid is then placed in the culture tube.Your doctor may need to remove a sample of skin or tissue (biopsy) for testing. If sample collection is likely to cause pain, you may be given an injection to numb the area (local anesthesia) first.Once a sample is collected, placed in a container with a substance (called growth medium or growth medium) that help bacteria, fungi or viruses.
Bacteria usually require one to two days to grow.
Fungi usually take several days to grow.
The viruses need to be placed in a container with living cells and can take weeks to grow.Any bacteria, fungi, or viruses that grow were identified under a microscope, chemical tests, or both. If susceptibility testing is done to help make decisions about treatment, the longer it feels necesitará.CómoIf you have a sample of tissue or fluid removed from a wound, you may feel some pain when the sample is collected. You may feel a brief sharp pain when given an injection of anesthetic to numb the area to be culture sample tomadas.RiesgosThere is a small risk of spread of some infections if a biopsy is needed to obtain the sample.
What Affects the TestReasons not to have the test or why the results may not be helpful include:
Taking antibiotics or just finished shooting.
Preparation of bacteria normally found in skin or tissue sample from the wound.To think
Types of bacteria that commonly cause wound infections are staph (Staphylococcus), strep (Streptococcus) and Clostridium perfringens, a bacterium found in soil and feces (stool) that can cause gangrene. The most common type of fungus that causes wound infection is Candida albicans.
Seeking fluid (such as pus) from a wound under a microscope can sometimes help identify the type of bacteria or fungi that cause the infection before culture results are ready.
A culture that does not grow any bacteria does not mean you do not have an infection. Sometimes the amount of collected sample, the age of the wound (or skin problem), the type of crop performed, and the previous use of antibiotics can prevent the growth of bacteria in culture.
A virus tests can be done to detect and identify a viral infection in the body that is causing the symptoms. For more information, see the topic of viral testing.
Most fungi grow very slowly and may not appear in a culture for several weeks. Your doctor may recommend that you start treatment before their culture results come back if he or she thinks you may have a yeast infection.
Sensitivity testing helps your doctor choose the best medication to treat certain types of bacteria, viruses or fungi.
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