TB tests use phlegm — not the easiest thing to get or work with. It takes time for results. And there can be false negatives ...

Before a stress test, you’ll need to avoid food, drink, tobacco, and caffeine for a time. You may also have to stop taking some medications. Your doctor will provide information specific to you, but ...

The anion gap blood test measures the acid-base and electrolyte balance in the blood. Results can show whether there is an imbalance in a person’s pH levels, which may be making the blood too acidic ...

What Is a RDW Blood Test? An RDW blood test – also known as a red blood cell distribution width blood test – is a measure of the difference in your red blood cells’ size and volume. RDW is one part of ...

Amid a rise in COVID cases and the start of fall allergies, flu and RSV season, experts say testing is an important tool heading into the cooler month. With more people testing positive for COVID once ...

The small intestinal bacterial overgrowth (SIBO) breath test is a noninvasive test that measures the amount of gases produced by bacteria in the small intestine. Small intestinal bacterial overgrowth ...

Mononucleosis tests can detect antibodies directed to viruses that cause mononucleosis. Usually, a doctor recommends these tests when someone has symptoms of the disease. People often refer to ...