Author: Paul Towet
COVID-19 TESTING: WHAT MOLECULAR, ANTIGEN AND ANTIBODY TESTS CAN TELL YOU
COVID-19 tests do not all answer the same question. Molecular tests detect viral genetic material, antigen tests detect viral proteins and antibody tests detect the immune response, with timing and specimen quality affecting interpretation.
TYPHOID TESTING: WHY ONE TEST RESULT MAY NOT BE ENOUGH
Typhoid fever can resemble many other illnesses, and no single test settles every case. Blood culture, antibody testing and other methods provide different kinds of evidence, with timing, antibiotics and specimen quality affecting what a result means.
BRUCELLOSIS TESTING: WHY EXPOSURE HISTORY AND THE RIGHT LABORATORY TEST MATTER
Brucellosis can resemble many other illnesses, so exposure history and the right laboratory method matter. Culture, antibody and molecular tests provide different kinds of evidence, while timing and laboratory safety are also important.
MALARIA TESTING: WHY SYMPTOMS, TIMING AND LABORATORY METHODS MATTER
Malaria symptoms can overlap with many other illnesses, so fever alone cannot confirm malaria. Microscopy and rapid diagnostic tests detect malaria in different ways, and timing, parasite levels and specimen quality can affect what a result means.
THE HIV WINDOW PERIOD: WHY TIMING MATTERS WHEN TESTING FOR HIV
The HIV window period is the time between infection and when a particular test can detect it. Antibody, antigen/antibody and nucleic acid tests become useful at different times, so the test type and timing matter when understanding a result.
SYPHILIS TESTING: WHY LABORATORIES USE MORE THAN ONE TEST
Syphilis testing often uses more than one kind of test because different tests provide different evidence. This article explains treponemal and non-treponemal tests, testing sequences, early infection, previous treatment and why results need context.
REFERENCE RANGES DECODED: HOW LABORATORIES DEFINE THE INTERVALS ON YOUR REPORT
A reference interval is the range laboratories use to put a test result into context. It is based on a defined population and testing method, so being inside or outside the range does not by itself diagnose or rule out disease.
BURNOUT AND LABORATORY TESTS: WHAT BLOOD TESTS CAN AND CANNOT REVEAL
Burnout is a workplace-related phenomenon, not a condition diagnosed by a blood test. Laboratory tests can help healthcare professionals investigate medical causes of symptoms such as fatigue, but no routine blood test confirms burnout.
BEYOND THE CBC: WHAT OTHER LABORATORY TESTS MAY ADD TO THE PICTURE
A complete blood count can provide valuable information about blood cells, but it cannot answer every health question. Other laboratory tests may add useful information when they address a specific clinical question, while unnecessary testing can create confusion, anxiety and cost.
THE VITAMIN D TEST: WHAT A 25(OH)D RESULT CAN AND CANNOT TELL YOU
The 25(OH)D blood test is the main laboratory test used to assess vitamin D status, but it is not a general score of health or immunity. Its meaning depends on the test method, units, reference information and clinical reason for testing.