MSRB1 and Alzheimer disease: Therefore, the aim was to analyze the prevalence of genes encoding selX, members of the EGC (seg, selI, selM, selN, selO, selU), and classic staphylococcal superantigens (sea, seb, sec, sed, see, tstH) on lesional skin, nonlesional skin, and in the anterior nares of patients with AD and to correlate the results to selected clinical parameters of the study group.