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Introduction of ABO Blood Grouping and Rh Typing ABO blood grouping and Rh typing are the most common blood group systems. There are nearly 300 blood group systems so far discovered. Other than ABO and  Rh are MNS, Lutheran, Kell, Duffy, etc. Karl Landsteiner discovered ABO ( A, B and O)  in 1900. Two years later, Decastello and Sturli added AB and finally ABO system gets completed. In 1940, Karl Landsteiner and Winner discovered Rh factor...

Introduction of Kito- Katz Technique Kito-Katz technique or cellophane fecal thick smear also called the Kato technique is a very simple method of detecting and counting eggs of parasites in human feces and is easy to perform in a simple laboratory setup. Principle of Kito- Katz Technique In the Kito-Katz technique, one gram of stool is pressed through a mesh screen to remove large particles, and then a portion of the sieved sample is transferred to the hole of...

Introduction of Antigen-Antibody Reaction Antigen-antibody reaction ( interaction between antigen and antibody) is reversible, occurs at the surface and there is no denaturation of antigen (Ag) and antibody(Ab) during the reaction. Richard J. Goldberg gave the first correct description of the antigen-antibody reaction at the University of Wisconsin in 1952 and it came to be known as "Goldberg's theory" (of Ag-Ab reaction).  This reaction is highly specific, and an antigen reacts only with antibodies produced by...