Background: Cytomegalovirus (CMV) is among the most common opportunistic infections identified in patients\nwith HIV/AIDS. CMV often targets the colon in such patients. However, the role of regulatory T cells (Tregs) and\nProgrammed death-1 (PD-1) in intestinal CMV infection is unclear. In this study, we evaluate the expression of programmed\ndeath -1 (PD-1) and its association with regulatory T cells (Tregs) in patients with HIV/AIDS having CMV\ncolitis.\nMethods: CMV was detected in the intestinal mucosal biopsy samples via nucleic acid in situ hybridization...........................
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