A blood test is a powerful tool used by doctors to diagnose various health conditions, including infections. If you are feeling unwell and your doctor suspects an infection, a blood test can provide valuable insights. But what exactly does a blood test indicate about an infection, and how can it help in determining the right treatment?
How a Blood Test Indicates Infection?
When an infection is present in the body, it often triggers changes in the blood. These changes can be detected through different types of blood tests. The most common one is the full blood count (FBC) test, which measures different components of the blood, including white blood cells, red blood cells, and platelets.
White blood cells (WBCs) play a crucial role in fighting infections. A high WBC count often suggests that your immune system is responding to an infection. Depending on the type of infection, different types of white blood cells may increase in number. For example:
- Neutrophils: These fight bacterial infections. A rise in neutrophils in a blood test for bacterial infection often suggests a bacterial illness.
- Lymphocytes: These help combat viral infections. An increase in lymphocytes can indicate a viral infection.
- Eosinophils: These are typically linked to allergic reactions or parasitic infections.
- Monocytes: These increase in response to chronic infections.
Other Indicators of Infection in a Blood Test
Apart from white blood cell count, other markers in a blood test can indicate an infection:
- C-reactive protein (CRP): This protein increases when there is inflammation in the body, which often happens during infections.
- Erythrocyte sedimentation rate (ESR): A high ESR suggests inflammation or infection.
- Procalcitonin: This is a useful marker for detecting severe bacterial infections.
When Should You Get a Blood Test for Infection?
If you have symptoms like fever, fatigue, swollen glands, or persistent cough, a blood test may help in diagnosing the cause. Private blood tests are available for those who prefer a quick and convenient option. You can book a blood test online or visit a local clinic for testing.
Doctors usually recommend a blood test for bacterial infection when antibiotics may be needed. If you have been feeling unwell for an extended period without a clear cause, a blood test can help determine if an infection is to blame.
Can Infections Always Be Detected in a Blood Test?
While blood tests are highly effective, not all infections show up immediately. Some viral infections may not cause noticeable changes in blood markers early on. In such cases, further tests may be required for an accurate diagnosis.
Book Your Blood Test Today – Stay Healthy with Touchwood Pharmacy
If you are feeling unwell and suspect an infection, don’t wait. Touchwood Pharmacy offers private blood tests to help detect infections quickly and accurately. With convenient locations and the option to book a blood test online, getting tested has never been easier. Take charge of your health today and book an appointment at Touchwood Pharmacy for a reliable and hassle-free experience.
