Neutrophil count in a blood culture probe (qualitative screening)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like fever, chills, or signs of infection, such as redness, swelling, or pus. It can also be used to monitor your response to treatment for suspected infections.

The test involves collecting a small sample of blood from a blood culture probe (a device inserted into a wound or body cavity to detect bacteria). Neutrophils, a type of white blood cell, are examined under a microscope to determine if bacteria are present.

You may need to avoid certain medications or treatments that could affect the test results. Follow your healthcare provider’s instructions carefully. If you have a wound or infection site, it may be cleaned or prepared before the probe is inserted.

The blood sample is taken from the probe, and the neutrophils are analyzed for signs of bacterial contamination. This process is usually quick and painless, though you might feel slight discomfort at the insertion site.

After the procedure, you may experience mild soreness or redness at the insertion site. Monitor for signs of infection, such as increased pain, swelling, or fever. Follow up with your healthcare provider if you have concerns.

The test result is qualitative and indicates whether neutrophils are present in the sample, suggesting possible bacterial contamination. A positive result may prompt further diagnostic testing, such as additional blood cultures or antibiotic treatment.

If the test shows neutrophils in the sample, it may mean there is an infection. If no neutrophils are detected, it suggests no bacterial presence in the sample at that time. Always discuss results with your healthcare provider for personalized interpretation.