Theory & Practices of Clinical Laboratory
Samuel Darling, a physician practicing at the Canal Zone Hospital in Panama, initially reported histoplasmosis and named the bacterium in 1904. He mistook the bacterium, which resembled Leishmania in tissues, for a parasite. Histoplasma capsulatum is a thermally dimorphic fungus that occurs as a mold in the environment and at …
Von Behring and Kitasato discovered an agent in the blood capable of neutralizing diphtheria toxin in 1890. The term ‘Antikörper,’ or antibodies, was used in investigations the following year to describe the agent’s capacity to distinguish between two immunological compounds. As a result, the substance that causes the creation of …
Hepatic Lipase belongs to the lipase gene family, which also includes pancreatic lipase, Hepatic Lipase, and endothelial lipase. In humans, the Hepatic Lipase (HL) gene is found on chromosome 15 (q15–q22). It is more over 60 kb in length, with eight introns and nine exons accounting for 1.6 kb. Hepatic …
The name gonorrhea, which means “flow of seed,” was initially used in the second century when the urethral discharge was mistaken for sperm. For years, the illnesses syphilis and gonorrhea were confused since they were frequently seen in the same person. In 1530, gonorrhea was regarded to be an early …
Leucine aminopeptidase (LAP) is an enzyme that is employed in a test for the presumptive identification of Streptococci. LAP is a peptidase that hydrolyzes peptide bonds near free amino groups. LAP is known as leucine aminopeptidase because it responds most efficiently with leucine. Leucine- β-naphthylamide is hydrolyzed to yield β-naphthylamine. …
The measurement or quantification of cells suspended in a fluid phase is performed using flow cytometry. Fluorochrome-coupled antibodies specific for a certain cellular marker are used to label the cells. The fluidics chamber enables that cell travel via a laser beam in a single file, exciting the fluorochrome. A detector …
The coccidian parasite Cyclospora cayetanensis was recently identified as a human intestinal pathogen. Schneider identified it in 1881, and Ashford reported it as a human infection in 1979. Cyclosporiasis, which is caused by ingestion of sporulated oocysts in contaminated food or water, has been identified as a primary source of …
Low-density lipoprotein cholesterol, or LDL cholesterol, is a kind of fat that circulates in the blood, transporting cholesterol across the body to where it’s needed for cell repair and depositing it inside artery walls. Because cholesterol and triglycerides are water insoluble, they must be bound to proteins in order to …
Water quality is considered by many laboratorians to be one of the most important preanalytical variables that impacts laboratory testing. Many people believe water to be a laboratory reagent, and it’s used to make buffers, blanks, calibrators, controls, mobile phase, reaction mixtures, and reagent reconstitution for a variety of lab …
Different kinds of biological fluids exist within the human body. These can be found in the intracellular and extracellular fluid compartments, respectively. Plasma is stored in the vascular compartment. Interstitial (including lymphatic), cerebral, pleural, pericardial, and gastrointestinal fluids are all included in the extravascular compartment. All body fluids have critical …