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Plasma cells, also called plasma B cells or effector B cells, are white blood cells that originate in the lymphoid organs as B cells [1] [2] and secrete large quantities of proteins called antibodies in response to being presented specific substances called antigens.
Modern complete blood count analyzers can provide an automated white blood cell differential, but they have a limited ability to differentiate immature and abnormal cells, so manual examination of the blood smear is frequently indicated. [5] [6] Blood smear examination is the preferred diagnostic method for certain parasitic infections, such as ...
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The Ii antigen system is a human blood group system based upon a gene on chromosome 6 and consisting of the I antigen and the i antigen. [1] The I antigen is normally present on the cell membrane of red blood cells in all adults, while the i antigen is present in fetuses and newborns. [2]
Reference ranges for blood tests of white blood cells, comparing eosinophil granulocyte amount (shown in light red) with other cells Eosinophils play an important role in asthma as the number of accumulated eosinophils corresponds to the severity of asthmatic reaction. [ 7 ]
These antigens are almost universally present on human red cells, but their absence has been noted in some individuals and some have been associated with transfusion reactions or other problems. Finding compatible units for transfusion to a patient that lacks one of these antigens is a major challenge and some countries maintain rare donor ...
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The Sid blood group system is a human blood group defined by the presence or absence of the Sd(a) antigen (also known as Sid antigen) on a person's red blood cells. [1] About 96% of people are positive for the Sd(a) antigen, [2]: 224 which is inherited as a dominant trait. Among Sd(a) positive individuals, the expression of the antigen ranges ...