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Direct and Indirect Coombs Test: Principle, Procedure, Uses, and Interpretation

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  Direct and Indirect Coombs Test: Principle, Procedure, Uses, and Interpretation The Coombs test , also known as the antiglobulin test (AGT) , is an important immunohematological laboratory test used to detect antibodies and complement proteins associated with red blood cells (RBCs). It is mainly used in the investigation of immune-mediated hemolysis, blood transfusion testing, and pregnancy-related blood group incompatibility. There are two major types of Coombs tests: Direct Coombs Test (DCT) and Indirect Coombs Test (ICT) . Although both tests use antihuman globulin, they detect antibodies in different locations. The Direct Coombs Test detects antibodies or complement already attached to red blood cells, while the Indirect Coombs Test detects antibodies present freely in the patient's serum or plasma. What Is the Coombs Test? The Coombs test is based on an antigen-antibody reaction involving red blood cells. Some antibodies, particularly IgG antibodies , can attac...
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DNA Test: A Complete Guide to Procedure, Types, Uses, Accuracy, and Results

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DNA Test: A Complete Guide to Procedure, Types, Uses, Accuracy, and Results DNA testing is a modern laboratory technique used to examine a person’s genetic material. DNA (Deoxyribonucleic Acid) contains genetic information that is inherited from biological parents. Because each person’s DNA profile is highly distinctive, except for identical twins, DNA testing can be used for identification, relationship testing, forensic investigations, and certain medical or genetic purposes. What Is a DNA Test? A DNA test is a laboratory analysis that examines specific regions of DNA to identify genetic characteristics. A sample is collected from the body, DNA is extracted from the cells, and selected genetic regions are analyzed. DNA testing does not always examine a person’s entire genome. In many tests, laboratories examine particular DNA markers that are useful for the specific purpose of the test. How Does DNA Testing Work? The basic DNA testing process involves several import...
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Semen Analysis Test

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Introduction Semen analysis, also called a semen test or sperm analysis , is a laboratory test used to evaluate semen and sperm. It provides important information about sperm production, movement, and structure. The test is commonly used when doctors are evaluating male reproductive health or possible fertility problems. Semen contains sperm cells along with fluids produced by different glands of the male reproductive system. A semen analysis examines several physical and microscopic characteristics of the sample. Purpose of Semen Analysis A semen analysis may be performed to: ·          Evaluate male reproductive health. ·          Investigate possible fertility problems. ·          Check the number and quality of sperm. ·          Assess sperm movement and structure. ·      ...
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Semen Analysis Test

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Semen Analysis Test Introduction Semen analysis, also called a semen test or sperm analysis , is a laboratory test used to evaluate semen and sperm. It provides important information about sperm production, movement, and structure. The test is commonly used when doctors are evaluating male reproductive health or possible fertility problems. Semen contains sperm cells along with fluids produced by different glands of the male reproductive system. A semen analysis examines several physical and microscopic characteristics of the sample. Purpose of Semen Analysis A semen analysis may be performed to: ·          Evaluate male reproductive health. ·          Investigate possible fertility problems. ·          Check the number and quality of sperm. ·          Assess sperm movement and structure. ·   ...
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Hepatitis B Virus: Structure, Replication, Pathogenesis, Variants, Epidemiology, Prevention and Diagnosis

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  Introduction Hepatitis means inflammation of the liver. Viral hepatitis is one of the most important infectious diseases affecting humans worldwide. Several different viruses can cause hepatitis, but the major human hepatitis viruses are Hepatitis A virus (HAV), Hepatitis B virus (HBV), Hepatitis C virus (HCV), Hepatitis D virus (HDV), Hepatitis E virus (HEV), and Hepatitis G virus (HGV) . These viruses differ in their genetic material, structure, routes of transmission, incubation period, clinical manifestations, and ability to cause chronic infection. The liver performs many essential functions, including metabolism of nutrients, detoxification of harmful substances, synthesis of proteins, and production of bile. When hepatitis viruses infect liver cells, they can cause inflammation and damage to the liver. Some infections are short-lasting and resolve completely, whereas others may become chronic and lead to cirrhosis, liver failure, or hepatocellular carcinoma . ...
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