Question: What Does A CBC Blood Test Show?

Why does a doctor order a CBC blood test?

A complete blood count (CBC) is a blood test that is commonly ordered by doctors.

A CBC is often ordered as part of a complete physical or when your doctor thinks you might have a certain condition, such as an infection.

A CBC may also be done to check on levels of prescribed medications in the body..

How do you read a CBC?

What Does a CBC Measure?White blood cells (WBCs). These help your body fight germs. … Red blood cells (RBC). These deliver oxygen throughout your body. … Hemoglobin (Hb or Hgb). This is the protein in your blood that holds oxygen.Hematocrit (Hct). … Mean corpuscular volume (MCV). … Platelets.

What does abnormal blood test results mean?

Abnormal results might be a sign of a disorder or disease. Other factors—such as diet, menstrual cycle, physical activity level, alcohol intake, and medicines (both prescription and over the counter)—also can cause abnormal results. Your doctor should discuss any unusual or abnormal blood test results with you.

Can CBC detect viral infection?

The things to look for in the CBC that support the presence of an infectious process are the white blood cell count (WBC) and differential. In non-localized infections of bacterial and viral origin, the total WBC count is elevated in non-immunosupressed patients.

Can a blood test detect diabetes?

Your health care professional can diagnose diabetes, prediabetes, and gestational diabetes through blood tests. The blood tests show if your blood glucose, also called blood sugar, is too high. Do not try to diagnose yourself if you think you might have diabetes.

What does a liver blood test detect?

Liver function tests check the levels of certain enzymes and proteins in your blood. Levels that are higher or lower than normal can indicate liver problems. Some common liver function tests include: Alanine transaminase (ALT).

Does CBC show autoimmune disease?

A complete blood count will also assess whether red blood cell counts are low. Low red blood cell counts can indicate anemia caused by bleeding, medications, “chronic disease,” autoimmune hemolytic anemia (breakdown of RBCs due to auto-antibodies), or a vitamin deficiency.

What type of infections can a CBC detect?

The CBC can evaluate your overall health and detect a variety of diseases and conditions, such as infections, anemia and leukemia….Some examples include:Anemia of various etiologies.Autoimmune disorders.Bone marrow disorders.Dehydration.Infections.Inflammation.Hemoglobin abnormalities.Leukemia.More items…•

Does dehydration affect CBC results?

A complete blood count (CBC) test evaluates the overall health of the blood cells circulating in the body. Hematocrit is one component of the CBC test that can be skewed as a result of dehydration.

What cancers Cannot be detected with a blood test?

These include breast, lung, and colorectal cancer, as well as five cancers — ovarian, liver, stomach, pancreatic, and esophageal — for which there are currently no routine screening tests for people at average risk.

Do viruses show up in blood tests?

Blood tests for the investigation of viral infections include: Full blood count — a viral infection may raise or reduce the white cell count; atypical lymphocytes may be reported.

What does a full blood count blood test show?

Full blood count (FBC) This is a test to check the types and numbers of cells in your blood, including red blood cells, white blood cells and platelets. This can help give an indication of your general health, as well as provide important clues about certain health problems you may have.

Can a blood test detect lymphoma?

Blood tests aren’t used to diagnose lymphoma, though. If the doctor suspects that lymphoma might be causing your symptoms, he or she might recommend a biopsy of a swollen lymph node or other affected area.

What does it mean when your blood test shows inflammation?

A high level of CRP in the blood is a marker of inflammation. It can be caused by a wide variety of conditions, from infection to cancer. High CRP levels can also indicate that there’s inflammation in the arteries of the heart, which can mean a higher risk of heart attack.

How can you tell the difference between a viral and bacterial infection on a CBC?

For example, if you have a bacterial infection, you will have an increase of neutrophils and a decrease in lymphocytes. Conversely, if you have a viral infection, you will have a decrease in neutrophils and an increase in lymphocytes.

What does abnormal CBC mean?

A CBC counts the cells and measures the levels of different substances in your blood. There are many reasons your levels may fall outside the normal range. For instance: Abnormal red blood cell, hemoglobin, or hematocrit levels may indicate anemia, iron deficiency, or heart disease.

What cancers are detected by blood tests?

Examples of tumor markers include prostate-specific antigen (PSA) for prostate cancer, cancer antigen 125 (CA 125) for ovarian cancer, calcitonin for medullary thyroid cancer, alpha-fetoprotein (AFP) for liver cancer and human chorionic gonadotropin (HCG) for germ cell tumors, such as testicular cancer and ovarian …

What blood tests show infection?

Blood tests: When testing the blood, measurements are taken to confirm an infection: a CBC (complete blood count), which will show if there is an increased white blood cell count; an ESR (erythrocyte sedimentation rate); and/or CRP (C-reactive protein) in the bloodstream, which detects and measures inflammation in the …