"Comparison of Absolute CD4⁺ Lymphocyte Counts Determined by Enzyme Immunoassay (TRAx CD4 Test Kit) and Flow Cytometry."

According to the authors' abstract of an article published in Clinical and Diagnostic Laboratory Immunology, "Currently, CD4⁺ lymphocyte counts are one of the most widely used surrogate markers for monitoring disease progression in and initiating therapy for human immunodeficiency virus-infected individuals. However, the process of obtaining lymphocyte subset counts can be complex and expensive, often rendering the test inaccessible to many patients. In contrast to standard laser-based flow cytometry, the TRAx CD4 Test Kit utilizes an enzyme-linked immunoassay format to provide CD4⁺ lymphocyte counts by a simple and more cost-effective means. In order to evaluate...

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